title: [History of epidemiologic methods-- cohort studies].
authors.affiliation: Department of Epidemiology and Health Statistics, School of Public Health, Beijing University, Beijing 100083, China
authors.forename: Ying
authors.initials: Y
authors.lastname: Qin
authors.forename: Si-Ting
authors.initials: ST
authors.lastname: Zhan
authors.forename: Li-ming
authors.initials: LM
authors.lastname: Li
mesh_terms: D002681:China; D015331:Cohort Studies; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans