1. Department of Orthopedic Surgery, Chang Gung Memorial Hospital, Chiayi, Taiwan
2. College of Medicine, Chang Gung University, Taoyuan, Taiwan
3. Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
4. Department of Orthopedic Surgery, Taipei Medical University Hospital, Taipei, Taiwan
5. Department of Orthopedics, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan