1. Department of Orthopaedic Surgery, Minhang Hospital, Fudan University, Shanghai, China
2. Shandong Institute of Orthopaedics and Traumatology, Affiliated Hospital of Qingdao University, Qingdao, China
3. Department of Orthopaedics, Affiliated Hospital of Qingdao University, Qingdao, China
4. Department of Pathology, Affiliated Hospital of Qingdao University, Qingdao, China