1. Department of Health Informatics and Management, School of Health Humanities, Peking University, Beijing, 100191, China
2. School of Statistics, Beijing Normal University, Beijing, 100875, China
3. School of Nursing, Peking University, Beijing, 100191, China
4. Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Beijing, 100191, China