A statistics primer. Types of studies in the medical literature.
Kuhn
J E
JE
University of Michigan, Orthopedic Surgery, Ann Arbor, 48109, USA.
Greenfield
M L
ML
Wojtys
E M
EM
D016022:Case-Control Studies; D002986:Clinical Trials as Topic; D015331:Cohort Studies; D006801:Humans; D010506:Periodicals as Topic; D012107:Research Design