1 Songjiang District Center for Disease Control and Prevention (Songjiang District Health Supervision Institute), Shanghai, China.
2 Key Laboratory of Public Health Safety of Ministry of Education, School of Public Health, Fudan University, Shanghai, China.
3 Department of Endocrinology and Metabolism, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Yong Loo Lin School of Medicine, National University of Singapore, Singapore. Electronic address: binwang1126@163.com.