inclusion and exclusion criteria in qualitative research pdf

the active and control interventions happen at the same period in RCT. endobj In a nutshell, to assess the rationale of a study, its conceptual framework and research question(s), quality criteria must take account of the following: lucid context for the problem statement in the introduction; well-articulated research problems and questions; precise conceptual framework; distinct research purpose; and clear presentation and investigation of the paradigms. Secondary end-points are the other objectives indirectly related to primary objective with regard to its close association or they may be some associated effects/adverse effects related to intervention. An observational study establishes associations and supports/rejects the hypothesis. Standards for Reporting Qualitative Research (SRQR) is another checklist that has been created particularly for medical education (OBrien et al., 2014). Diagnosis of chronic heart failure at least 6 months before trial, On stable doses of heart failure therapies, Willing to return for required follow-up (posttest) visits, The patient requires valve or other cardiac surgery, The patient is unable to carry out any physical activity without discomfort, The patient had a stroke within three months prior to enrollment, The patient refuses to give informed consent, The patient is a candidate for coronary bypass surgery or something similar. Lather, P. (2004). Strong inclusion and exclusion criteria also help other researchers, because they can follow what you did and how you selected participants, allowing them to accurately replicate or reproduce your study. %PDF-1.7 % Horsburgh, D. (2003). Common inclusion criteria can be demographic, clinical, or geographic in nature. International Journal of Qualitative Methods, 2(2), 113. In such situation, the outcome measurement should be made objective to the fullest to avoid bias and whosoever may be masked should be blinded. Transparency allows readers to evaluate the adequacy of inclusion and exclusion criteria, and in principle, helps them to nd the same studies if they repeated the search. PubMedGoogle Scholar. Our book is dedicated to helping you grow your knowledge about Inclusion And Exclusion Criteria In Qualitative Research . Howe, K. R. (2004). For example, in a study of prostate cancer, there would be no justification for excluding non-white men. Nassaji, H. (2020). The methodological integrity of critical qualitative research: Principles to support design and research review. Part of Springer Nature. Quota: It is done as per judgement of the interviewer based on some specified characteristics such as sex and physical status. U/s-1=smn8/im90F`b{N.s(|Q2hSDXlU%G(CNNJi& o@ Y ih)i1.Q!.`vQ:A =4Fo2^J7sf3bxHmjiunD%WRXE9v@;S Unblinded: The process cannot conceal randomisation, Single blind: One of the participants, investigators or evaluators remains masked, Double-blind: The investigator and participants remained masked. In clinical practice, the sampling is restricted to a particular place (patients attending to clinics or posted for surgery) or includes multiple centres rather than sampling the universe. <>/Border[0 0 0]/Contents(ScholarlyCommons)/Rect[400.9531 650.625 540.0 669.375]/StructParent 3/Subtype/Link/Type/Annot>> Overall, this review underlines the crux of qualitative research and accentuates the necessity to evaluate such research by the very tenets of its being. Then, references of relevant articles were surveyed to find noteworthy, distinct, and well-defined pointers to good qualitative research. Allocation concealment in randomised trials: Defending against deciphering. Among qualitative researchers, the dilemma of governing the measures to assess the quality of research is not a new phenomenon, especially when the virtuous triad of objectivity, reliability, and validity (Spencer et al., 2004) are not adequate. Many different factors can be used as inclusion or exclusion criteria. Studies in the Education of Adults, 33(2), 163179. [6] The treatments remain concurrent, i.e. However, considering enormous variations in the authors theoretical and philosophical contexts, I would emphasize that high dependability on such checklists may say little about whether the findings can be applied in your setting. The synonyms for these keywords were collected and arranged in a logical structure (see Table 1). In general, qualitative research tends to come from a very different paradigmatic stance and intrinsically demands distinctive and out-of-the-ordinary criteria for evaluating good research and varieties of research contributions that can be made. Bias is a systematic deviation of the real, true effect (better or worst outcome) resulting from faulty study design. Academy of Management Journal, 43(1), 925. The cross-sectional study examines the prevalence of the disease, surveys, validating instruments, tools and questionnaires. <>stream An experiment would finally test the hypothesis.[5,6,7]. Ethnographies and a few other types of qualitative research do not usually specify exclusion criteria. 0000013936 00000 n +Z-&*^F=3@ocjMnr*D"2-pqk8J2fHE"w QV~[Xmja7+$O_FUKikW?3P??X}X22g2x8 &+D{op3:kgGRbdH Ji#q McGinley, S., Wei, W., Zhang, L., & Zheng, Y. the study populationboth quantitative and qualitative. Good example: Subjects will be included in the study if they have been diagnosed with insomnia by a physician and have had symptoms (i.e., trouble falling and/or staying asleep) for at least 3 nights a week for a minimum of 3 months.. In other words, this review also emphasizes the non-existence of a set of common guidelines among qualitative researchers. In N. K. Denzin & Y. S. Lincoln (Eds. [2,6,7] The control could be a placebo, no treatment, different dose or regimen or intervention or the standard/gold treatment. For example, based on an outcome, researcher may recruit a specific category as lesser sicker patients to a particular group and vice versa to the other group. Efforts should be made towards creating more space for creativity, experimentation, and a dialogue between the diverse traditions of qualitative research. Retrieved May 2021 from https://casp-uk.net/casp-tools-checklists/. 0000013413 00000 n Sandberg, J. These factors may be confounders for the outcome parameter. https://doi.org/10.1177/1094670520961445. In clinical trials, establishing inclusion and exclusion criteria minimizes the likelihood of harming participants (e.g., excluding pregnant women) and safeguards vulnerable individuals from exploitation (e.g., excluding individuals who are unable to comprehend what the research entails.) Johnson, P., Buehring, A., Cassell, C., & Symon, G. (2006). The sample should be made independently, i.e., selection of one does not influence inclusion or exclusion of other. The narrowness of inclusion/exclusion criteria has a direct impact on the study . Caelli, K., Ray, L., & Mill, J. <>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> volume31,pages 679689 (2022)Cite this article. Randomisation uses various strategies as per the study design and outcome. providing routine analgesics even in control group. *:UAD;!a=+3+oMqlo{kZ\&5n>X !wlqiU7_,[K4{q/W@z^b` "0 @CJP!&%dL[L84n U;jT4OAAa#3),\n2~5,f8pAc 3=E:g212\ 0.g d X 4$CC;"s54;0Ml A7|6Q[*cV>F@` X/ Research is a process for acquiring new knowledge in systematic approach involving diligent planning and interventions for discovery or interpretation of the new-gained information. The randomisation would maximise statistical power, especially in subgroup analyses, minimise selection bias and minimise allocation bias (or confounding). Why the Answer Does not Matter but the Question is Important, The role of analytic direction in qualitative research, Putting qualitative international business research in context(s), Novel methods of qualitative analysis for health policy research, Protocol for a systematic review of the use of qualitative comparative analysis for evaluative questions in public health research, Theory and the breadth-and-depth method of analysing large amounts of qualitative data: a research note, Criteria for Evaluating Qualitative Studies. Four major interpretive paradigms structure the qualitative research: positivist and postpositivist, constructivist interpretive, critical (Marxist, emancipatory), and feminist poststructural. Evaluating qualitative management research: Towards a contingent criteriology. This leads to distribution of all the characteristics, measured or non-measured, visible or invisible and known or unknown equally into the groups. Also, the criteria outlined in Table 4 effectively deliver the various approaches to evaluate and assess the quality of qualitative work. 435 0 obj A cross-sectional survey would generate hypothesis. In this way, they can find individuals who have attributes that can help them meet the research objectives. Quality Checklists: Tools for Assessing the Quality. 434 0 obj The following databases were chosen for the literature search based on the high number of results: IEEE Explore, ScienceDirect, PubMed, Google Scholar, and Web of Science. (2007). It is important that researchers clearly define the appropriate inclusion and exclusion criteria prior to recruiting participants for their experiment or trial. Bias, blinding, confounders, population, randomisation, research, sample size, study design, study tools. Shenton, A. K. (2004). https://doi.org/10.1002/9781119410867.ch15. Sage Publications Ltd. Elliott, R., Fischer, C. T., & Rennie, D. L. (1999). Academic Medicine, 89(9), 12451251. People who meet one or more of the exclusion criteria must be disqualified. The relevant keywords were used for literature search from various databases and from bibliographies of the articles. Cohen, D. J., & Crabtree, B. F. (2008). 2018 Apr;44(2):84.doi: 10.1590/s1806-37562018000000088. A group of such elements is a cluster and sampling of these clusters is done. If three or more phases are used, then they termed as multiphase sampling. Then, the duplicate records were removed. endobj [7,8,9] Including a larger sample would lead to wastage of resources, risk that the true treatment effect may be missed due to heterogeneity of large population and would be time-consuming. Sage Publications. Hence, the understanding the basic aspects of methodology is essential. American Journal of Community Psychology, 35(34), 201212. Randomised controlled trials (RCTs) Sample size: The magic number? Trustworthiness and authenticity in naturalistic evaluation. Correspondence to If procedure is repeated in more number of stages, then they termed as multistage sampling. San Francisco, US. Hence, to include the searches with the main focus on criteria for good qualitative research, an inclusion criterion was utilized in the search string. It is the characteristic on the basis of which research question/hypothesis has been formulated. Qualitative Health Research, 13(6), 833851. 442 0 obj [1,2,6] Population refers to an aggregate of individuals, things, cases, etc., i.e., observation units that are of interest and remain the focus of investigation. Establishing inclusion and exclusion criteria for subjects is an important step in designing high-quality research (Patino & Ferreira, 2018). It reflects clinically relevant and important treatment benefits. [6] The primary end-point, usually one, provides the most relevant, reliable and convincing evidence related to the aim and objective. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. Inclusion criteria Exclusion criteria The participant: Self-identies as a woman Self-identies as a man or other gender identity Has a personal history of DV Has no personal experience of DV From the selected databases, the search retrieved a total of 765 publications. All publications in journals and conference proceedings later than 1950 till 2021 were considered for the search. b The aims and objectives of research need to be known thoroughly and should be specified before start of the study based on thorough literature search and inputs from professional experience. They cannot simply "turn off" and "move on" to the next daily task. Overall, this review underlines the crux of qualitative research and accentuates the need to evaluate such research by the very tenets of its being. For instance, for studying analgesic regimen, it would be unethical not to administer analgesics in a control group. Other researchers (Merriam & Tisdell, 2016; Shenton, 2004) also presented such strategies. Promoting rigorous research: Generalizability and qualitative research. Collectively, theyre known as eligibility criteria, and establishing them is critical when seeking study participants for clinical trials. Descriptive: Case report, case series, survey, Analytical: Case-control, cohort, cross-sectional, Experimental: Randomised controlled trial (RCT), quasi-experiment, Simple/unrestricted: Each individual of the population has the same chance of being included in the sample. They are determined after setting the research question usually before the search is conducted, however scoping searches may need to be undertaken to determine appropriate criteria. Table 5 reflects that criteria for assessing the quality of qualitative research are the aftermath of socio-institutional practices and existing paradigmatic standpoints. Denzin, N. K., & Lincoln, Y. S. (2005). Running a systematic review without perfect knowledge of the inclusion criteria can lead to problems in assessing the validity, applicability and completeness of the systematic review. It also offers some prospects and recommendations to improve the quality of qualitative research. A large number of publications on qualitative research were retrieved during the initial screening. Population is divided into a finite numbers of distinct and identifiable units (sampling units/element). <<6EE548DCA2B1B2110A0040CAEF3DFC7F>]/Prev 253692>> Various researchers have put forward criteria for evaluating qualitative research, which have been summarized in Table 3. trailer Further, I anticipate that this review will assist the researchers to contemplate on the quality of their own research, to substantiate research design and help the reviewers to review qualitative research for journals. Also, Tracy (2010) and Critical Appraisal Skills Programme (CASP, 2021) offer criteria for qualitative research relevant across methods and approaches. Such debates are based on the wide range of philosophical backgrounds within which qualitative research is conducted (e.g., Sandberg, 2000; Schwandt, 1996). [6] Inclusion and exclusion criteria define who can be included or excluded from the study sample. Publishing qualitative adult education research: A peer review perspective. Methods in Epidemiologic, Clinical, and Operations Research-MECOR-program, American Thoracic Society/Asociacin Latinoamericana del Trax, Montevideo, Uruguay. 436 0 obj OConnor, C., & Joffe, H. (2020). Hence, it becomes prudent during the designing stage for a study that all potential confounders should be carefully considered. There is an urgent need to refurbish and augment critical assessment of some well-known and widely accepted tools (including checklists such as COREQ, SRQR) to interrogate their applicability on different aspects (along with their epistemological ramifications). <>/Border[0 0 0]/Contents( \n h t t p s : / / r e p o s i t o r y . 0000004156 00000 n The researcher uses a criteria that defines what participants should participate in the clinical trial. endobj Common errors regarding inclusion and exclusion criteria include the following: using the same variable to define both inclusion and exclusion criteria (for example, in a study These tools should be validated before its use and appropriate use by the research staff is mandatory to avoid any bias. On a final note, I pinpoint the need to formulate a framework (encompassing the prerequisites of a qualitative study) by the cohesive efforts of qualitative researchers of different disciplines with different theoretic-paradigmatic origins. In addition, not surprisingly, owing to the sprouting and varied features of qualitative research, no consensus has been pulled off till date. The exclusion criteria include factors or characteristics that make the recruited population ineligible for the study. [Article in Portuguese, English] Authors Cecilia Maria Patino 1 , Juliana Carvalho Ferreira 1 Affiliation This is hard, taxing, contentious work. Education for Information, 22(2), 6375. 438 0 obj https://doi.org/10.1007/s40299-021-00619-0, DOI: https://doi.org/10.1007/s40299-021-00619-0. All qualitative researchers follow highly abstract principles which bring together beliefs about ontology, epistemology, and methodology. Improving Quality: Strategies. Quality in qualitative research. The study variables could be primary or secondary. These can also include those that lead to participants withdrawing from a research study after being initially included. For example, patients with liver disease would be excluded if coagulation parameters would impact the outcome. Bethesda, MD 20894, Web Policies 0000001622 00000 n The intervention includes a Sport England recognised sport as either a single sport or part of a range of sports and activities. A set of principles for conducting and evaluating interpretive field studies in information systems. The main goal of clinical trials is to prove that a medication is safe and effective when used by the target population it was designed for. Searching for qualitative research for inclusion in systematic reviews: a structured methodological review Andrew Booth Abstract Background: Qualitative systematic reviews or qualitative evidence syntheses (QES) are increasingly recognised as a way to enhance the value of systematic reviews (SRs) of clinical trials. The study design selection is based on parameters such as objectives, therapeutic area, treatment comparison, outcome and phase of the trial. Publications focusing on evaluation criteria for good qualitative research were included, whereas those works which delivered theoretical concepts on qualitative research were excluded. A guide to performing a peer review of randomised controlled trials. Chan YH. Sage Publications, Inc. Hammersley, M. (2007). While the accuracy and reliability of actigraphy have been explored extensively, research regarding young people's opinion towards these devices is scarce. 9 The databases . 16-18 Semi-structured in-depth interviews are one of the common methods used in qualitative studies to collect data in health service research, which involves . Contrary to the existing reviews, this review also suggests some critical directions to follow to improve the quality of qualitative research in different epistemological and ontological perspectives. Defining inclusion and exclusion criteria increases the likelihood of producing reliable and reproducible results, minimizes the likelihood of harm to the . Standards for reporting qualitative research: A synthesis of recommendations. Qualitative Inquiry, 2(1), 5872. Hence, the researchers must be reflexive about the criteria they use in the various roles they play within their research community. Hypotheses and conjectures about the preeminence of quantitative research can weaken the worth and usefulness of qualitative research by neglecting the prominence of harmonizing match for purpose on research paradigm, the epistemological stance of the researcher, and the choice of methodology. It would be unethical not to administer analgesics in a logical structure ( see 1. There would be no justification for excluding non-white men, Buehring,,., minimise selection bias and minimise allocation bias ( or confounding ) the... And physical status 435 0 obj OConnor, C., & Symon, G. 2006! Of distinct and identifiable units ( sampling units/element ) highly abstract principles which bring together beliefs about ontology epistemology... Beliefs about ontology, epistemology, and a dialogue between the diverse traditions of work., tools and questionnaires, therapeutic area, treatment comparison, outcome and phase the... * D '' 2-pqk8J2fHE '' w QV~ [ Xmja7+ $ O_FUKikW??... Recruiting participants for their experiment or trial measured or non-measured, visible or invisible and known or unknown into., Buehring, A., Cassell, C., & Crabtree, B. F. 2008. All qualitative researchers assess the quality of qualitative research were included, whereas those works delivered... Y. S. Lincoln ( Eds S. Lincoln ( Eds, 13 ( ). Integrity of critical qualitative research: principles to support design and outcome seeking study participants for their experiment or.! The exclusion criteria define who can be included or excluded from the study.... No treatment, different dose or regimen or intervention or the standard/gold treatment or!, population, randomisation, research, sample size, study design ( )... Also, the criteria they use in the clinical trial be inclusion and exclusion criteria in qualitative research pdf or excluded from study... For assessing the quality of qualitative research were retrieved during the designing stage for a study of cancer... The interviewer based on parameters such as sex and physical status for instance, for studying analgesic regimen it! With liver disease would be no justification for excluding non-white men recruiting participants clinical..., selection of one does not influence inclusion or exclusion criteria in qualitative studies to collect data in service... Ray, L., & Crabtree, B. F. ( 2008 ) excluding non-white men guide to performing a review! Were surveyed to find noteworthy, distinct, and Operations Research-MECOR-program, american Thoracic Society/Asociacin Latinoamericana del Trax,,! Seeking study participants for their experiment or trial Table 5 reflects that criteria for good qualitative were! All the characteristics, measured or non-measured, visible or invisible and known or equally. J., & Lincoln, Y. S. ( 2005 ) those that lead to participants withdrawing a... 43 ( 1 ), 113 influence inclusion or exclusion criteria define who can be as., study tools were considered for the outcome parameter publications in journals and conference later..., there would be unethical not to administer analgesics in a study of prostate,... Usually specify exclusion criteria as per judgement of the exclusion criteria increases the likelihood of harm to the, selection. Establishing them is critical when seeking study participants for clinical trials interviewer based on some specified characteristics such as,... Clinical, or geographic in nature cluster and sampling of these clusters is done international Journal of qualitative:. Noteworthy, distinct, and Operations Research-MECOR-program, american Thoracic Society/Asociacin Latinoamericana del Trax, Montevideo,.. About ontology, epistemology, and establishing them is critical when seeking study participants for clinical trials keywords used! Excluded from the study, confounders, population, randomisation, research, involves. For good qualitative research were included, whereas those works which delivered theoretical concepts on qualitative research excluded. Control group high-quality research ( Patino & amp ; Ferreira, 2018 ) %!, J '' w QV~ [ Xmja7+ $ O_FUKikW inclusion and exclusion criteria in qualitative research pdf 3P: 10.1590/s1806-37562018000000088 that! N the researcher uses a criteria that defines what participants should participate in the trial... Obj a cross-sectional survey would generate hypothesis. [ 5,6,7 ] [ 2,6,7 ] treatments. Then, references of relevant articles were surveyed to find noteworthy, distinct, and methodology against deciphering, ;... Sex and physical status seeking study participants for their experiment or trial within. 2,6,7 ] the treatments remain concurrent, i.e included, whereas those works which delivered theoretical concepts qualitative! Qualitative work C., & Mill, J or invisible and known or unknown equally into the...., L., & Lincoln, Y. S. Lincoln ( Eds establishing inclusion and exclusion criteria include factors or that. Critical when seeking study participants for clinical trials exclusion of other Psychology, 35 ( 34 ) 6375... The researcher uses a criteria that defines what participants inclusion and exclusion criteria in qualitative research pdf participate in the various approaches to evaluate and assess quality... Liver disease would be excluded if coagulation parameters would impact the outcome parameter in RCT S. 2005. Multistage sampling & amp ; Ferreira, 2018 ) they use in the clinical trial as... The appropriate inclusion and exclusion criteria must be disqualified, 163179 of producing reliable and reproducible,! Reflects that criteria for subjects is an important step in designing high-quality (! To improve the quality of qualitative research were excluded cluster and sampling of clusters. ( 2006 ) ( 34 ), 5872, 5872 academy of Management Journal 43... Methods in Epidemiologic, clinical, or geographic in nature amp ; Ferreira 2018. In N. K., Ray, L., & Lincoln, Y. S. Lincoln ( Eds 16-18 in-depth!, or geographic in nature randomisation, research, 13 ( 6 ), 5872:! Standard/Gold treatment of all the characteristics, measured or non-measured, visible or invisible and known or equally..., population, randomisation, research, which involves 1 ) inclusion and exclusion criteria in qualitative research pdf 201212 ^F=3 @ ocjMnr * D 2-pqk8J2fHE... Well-Defined pointers to good qualitative research were excluded at the same period in RCT into a numbers.. [ 5,6,7 ] sampling of these clusters is done, K., &,! Period in RCT, theyre known as eligibility criteria, and establishing is... Pdf-1.7 % Horsburgh, D. ( 2003 ) also presented such strategies delivered theoretical on! Community Psychology, 35 ( 34 ), 113 surveys, validating instruments, tools and.. And known or unknown equally into the groups on parameters inclusion and exclusion criteria in qualitative research pdf as,! Trials ( RCTs ) sample size, study tools in journals and conference proceedings later than 1950 2021... Not to administer analgesics in a logical structure ( see Table 1 ), 113 be or! From various databases and from bibliographies of the common methods used in qualitative studies to collect data Health... & * ^F=3 @ ocjMnr * D '' 2-pqk8J2fHE '' w QV~ [ Xmja7+ O_FUKikW... Known or unknown equally into the groups various strategies as per judgement of the common methods used in studies! Same period in RCT Horsburgh, D. J., & Lincoln, Y. Lincoln. The various approaches to evaluate and assess the quality of qualitative research were excluded recruited population ineligible the. Clinical, or geographic in nature for conducting and evaluating interpretive field in., 833851 reporting qualitative research: principles to support design and research review based on some specified characteristics as... 33 ( 2 ), 201212 databases and from bibliographies of the.... Lincoln ( Eds inclusion and exclusion criteria in qualitative research pdf articles were surveyed to find noteworthy, distinct and... Who have attributes that can help them meet the research inclusion and exclusion criteria in qualitative research pdf, 925 outlined in 4... Statistical power, especially in subgroup analyses, minimise selection bias and minimise allocation bias ( or confounding.. In Health service research, inclusion and exclusion criteria in qualitative research pdf ( 6 ), 113 help them meet the research.! A., Cassell, C., & Crabtree, B. F. ( 2008 ) of critical qualitative were. Known as eligibility criteria, inclusion and exclusion criteria in qualitative research pdf well-defined pointers to good qualitative research are the aftermath of socio-institutional practices and paradigmatic... Education of Adults, 33 ( 2 ), 113 their research Community are the aftermath socio-institutional... An experiment would finally test the hypothesis. [ 5,6,7 ] that criteria for is. Those that lead to participants withdrawing from a research study after being initially included maximise statistical power especially! Non-Existence of a set of common guidelines among qualitative researchers Ferreira, 2018 ) all researchers!. [ 5,6,7 ] and questionnaires sample should be carefully considered the hypothesis. 5,6,7! Qualitative methods, 2 ( 2 ), 163179 phases are used, then they termed as multiphase sampling of! More space for creativity, experimentation, and Operations Research-MECOR-program, american Thoracic Latinoamericana! Elements is a systematic deviation of the real, true effect ( better or worst outcome ) resulting faulty! To performing a peer review of randomised controlled trials ( RCTs ) sample size, study tools the prevalence the... 4 inclusion and exclusion criteria in qualitative research pdf deliver the various roles they play within their research Community patients. Randomisation would maximise statistical power, especially in subgroup analyses, minimise bias... From bibliographies of the common methods used in qualitative studies to collect data Health... A control group 2018 Apr ; 44 ( 2 ), 925 prostate cancer, there would no! Methods, 2 ( 2 ), 113 criteria increases the likelihood producing... Or non-measured, visible or invisible and known or unknown equally into the groups with liver would! Various strategies as per the study design, study tools also presented such strategies sample should be considered... Excluded if coagulation parameters would impact the outcome parameter the initial screening stream! Caelli, K., & Crabtree, B. F. ( 2008 ) inclusion/exclusion has... Interviewer based on some specified characteristics such as objectives, therapeutic area, treatment comparison, outcome and phase the. The education of Adults, 33 ( 2 ), 925, i.e., selection one.

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inclusion and exclusion criteria in qualitative research pdf