1. Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Keelung branch, Bone and Joint Research Center, and Chang Gung University, F7, No 222 Mai-King Road, Keelung, Taiwan
2. Department of Orthopaedic Surgery and Rehabilitation Medicine, State University of New York, Downstate Medical Center, 450 Clarkson Ave, Brooklyn, NY, 11203, United States.
3. Department of Physical Medicine and Rehabilitation, Taipei Veterans General Hospital, Taipei, Taiwan.
4. Bone and Joint Research Center, Department of Orthopedic Surgery, Chang Gung Memorial Hospital-Linkou & University College of Medicine