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Distinguishing Case Series From Cohort Studies
Olaf M. Dekkers, MD, PhD, MA, MSc; Matthias Egger, MD, MSc; Douglas G. Altman, DSc; Jan P. Vandenbroucke, MD, PhD
Annals of Internal Medicine 2012;156:37-40. doi:10.7326/0003-4819-156-1-201201030-00006

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