1. Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University , Guangzhou 510515 , China
2. School of Public Health, Southern Medical University , Guangzhou 510515 , China
3. Department of Orthopedics and Traumatology, Nanfang Hospital, Southern Medical University , Guangzhou 510515 , China
4. Department of Hospital Infection Management, Nanfang Hospital, Southern Medical University , Guangzhou 510515 , China