1. Department of Cancer Epidemiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
2. Institutes of Biomedical Sciences, Shanxi University, Taiyuan, China
3. School of Public Health, Peking Union Medical College, Beijing, China
4. Shenzhen Center for Disease Control and Prevention, Shenzhen, China