1. Department of Laboratory Medicine, Tianfu New Area People's Hospital, Chengdu, Sichuan 610213, P.R. China
2. Key Laboratory of Clinical Laboratory Medical Diagnostics, Ministry of Education, Chongqing Medical University, Chongqing 400016, P.R. China
3. Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China