Toward an "unconfounded" classification of epidemiologic research design. Kramer MS, Boivin JF. J Chronic Dis. 1987;40(7):683-8. doi: 10.1016/0021-9681(87)90104-4. PMID: 3496346
Importance of the study protocol in epidemiologic research. Ott MG. J Occup Med. 1991 Dec;33(12):1236-9. PMID: 1800680
Study design in qualitative research: a guide to assessing quality. Ward MM. J Gen Intern Med. 1993 Feb;8(2):107-9. doi: 10.1007/BF02599996. PMID: 8441071
Methodology of clinical epidemiologic research and how to report and systematically review it. Editor's note. Knottnerus JA, Tugwell P. J Clin Epidemiol. 2009 Oct;62(10):1001-2. doi: 10.1016/j.jclinepi.2009.08.011. PMID: 19747618
Directionality in epidemiologic research. Feinstein AR. J Clin Epidemiol. 1988;41(8):705-7. doi: 10.1016/0895-4356(88)90153-9. PMID: 3418357
Design options of prospective epidemiologic studies. Brenner H. J Clin Epidemiol. 1994 Aug;47(8):959-60. doi: 10.1016/0895-4356(94)90201-1. PMID: 7730901
On the classification of research. DeVita VT. Cancer J. 2003 Jan-Feb;9(1):2-3. doi: 10.1097/00130404-200301000-00002. PMID: 12602761
Use of test accuracy study design labels in NICE's diagnostic guidance. Olsen M, Zhelev Z, Hunt H, Peters JL, Bossuyt P, Hyde C. Diagn Progn Res. 2019 Sep 05;3:17. doi: 10.1186/s41512-019-0062-9. eCollection 2019. PMID: 31517065