title: Meta-analyses of etiologic studies should account for the underlying biologic mechanisms.
authors: Department of Epidemiology and Health Statistics, The Medical College of Qingdao University, Dongzhou Road, No. 38, Qingdao, 266021, Shandong, People's Republic of China.
authors: Yili
authors: Y
authors: Wu
authors: Dongfeng
authors: D
authors: Zhang
mesh_terms: D001943:Breast Neoplasms / Q000453:epidemiology*; D015444:Exercise; D005260:Female; D006801:Humans