1. Department of Orthopaedic Surgery or Institute of Bone and Joint Research, The Second Hospital of Lanzhou University, Lanzhou, Gansu, China
2. Department of Orthopaedic Surgery, Key Laboratory of Orthopedics of Gansu Province, Lanzhou, Gansu, China
3. Department of Orthopaedic Surgery, People’s Hospital of Gansu Province, Lanzhou, Gansu, China
4. Pritzker School of Medicine, University of Chicago, Chicago, IL, USA