1. Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China
2. Department of Chronic Noncommunicable Diseases Prevention and Control, The Inner Mongolia Autonomous Region Comprehensive Center for Disease Control and Prevention, Inner Mongolia, China
3. School of Public Health, Baotou Medical College, Baotou, China
4. Bigdata Division, Innovation Center, Peking University Health Information Technology, Beijing, China
5. Department of Maternal and Child Health, School of Public Health, Peking University, Beijing China