1. Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
2. Department of Food and Environment, School of Public Health; Qiqihar Medical University; Qiqihar China
3. Fujian Provincial People's Hospital; Fuzhou China
4. Guangdong Provincial People's Hospital and Cardiovascular Institute; Guangzhou China
5. Sichuan Centre for Disease Control and Prevention; Chengdu China
6. Yuxian People's Hospital; Yuxian China