?:authorAffiliation
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[\'Department of Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China.\', \'Guangzhou Center for Disease Control and Prevention, Guangzhou, China.\', \'Medical College of Shaoguan University, Shaoguan, China.\', \'Guangzhou Center for Disease Control and Prevention, Guangzhou, China. Electronic address: gzcdczzb@gzcdc.org.cn.\', \'Department of Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China. Electronic address: zhdingm@mail.sysu.edu.cn.\']
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