TThe selection of control groups in case-control studiesThe selection of control groups in case-control studiesde Sarah OlsonMateriasRandom AllocationRandomized Controlled Trials as TopicClinical Trials as TopicHospital RecordsEdiciones (2)The selection of control groups in case-control studies (1992)inglésThe selection of control groups in case-control studies (1992)inglésMás obras de Sarah OlsonFFitness and Nutrition JournalFitness and Nutrition JournalEEw, Goo!Ew, Goo!OOnly the BraveOnly the Brave