1. Department of Human Resources; Ruijin Hospital, Affiliated with the School of Medicine, Shanghai Jiaotong University; Shanghai China
2. Department of Community Health and Behavioral Medicine, School of Public Health, School of Medicine; Shanghai Jiaotong University; Shanghai China
3. Department of Hospital Infection Control; Ruijin Hospital, Affiliated with the School of Medicine, Shanghai Jiaotong University; Shanghai China
4. Department of Chronic Disease Prevention, Shanghai Hongkou Center for Disease Control and Prevention; Shanghai China