title: [Bias and confounding in the epidemiologic studies].
authors.affiliation: Department of Epidemiology and Health Statistics, College of Public Health, Beijing University, Beijing 100083, China
authors.forename: Tao
authors.initials: T
authors.lastname: Ren
authors.forename: Si-ting
authors.initials: ST
authors.lastname: Zhan
authors.forename: Xia
authors.initials: X
authors.lastname: Shen
authors.forename: Fan-ya
authors.initials: FY
authors.lastname: Meng
authors.forename: Yong-hua
authors.initials: YH
authors.lastname: Hu
authors.forename: Li-ming
authors.initials: LM
authors.lastname: Li
mesh_terms: D015982:Bias; D015986:Confounding Factors, Epidemiologic; D004812:Epidemiologic Methods; D006801:Humans