1. Department of Clinical Laboratory, Affiliated Hospital of Weifang Medical University, Weifang 261031, Shandong, China
2. Department of Health Statistics, Key Laboratory of Medicine and Health of Shandong Province, School of Public Health, Weifang Medical University, Weifang 261053, Shandong, China
3. Department of Orthopedics, Sunshine Union Hospital, Weifang 261061, Shandong, China
4. School of Public Health, Weifang Medical University, Weifang 261053, Shandong, China