1. Department of Joint Surgery, Tianjin Hospital, Tianjin 300211, P.R. China
2. Department of Orthopedics, Second Affiliated Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300150, P.R. China
3. Department of Joint Surgery, Yuhuangding Hospital, Yantai, Shandong 264000, P.R. China
4. Department of Rheumatology and Immunology, Tianjin First Center Hospital, Tianjin 300192, P.R. China
5. Department of Orthopedics, Tianjin Dongli Hospital, Tianjin 300300, P.R. China