?:authorAffiliation
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[\'Sichuan Center of Disease Control and Prevention, Chengdu, Sichuan, China.\', \'Department of Epidemiology and Biostatistics, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, Sichuan, China.\', \'Vanke School of Public Health, Tsinghua University, Beijing, China.\']
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