1. Department of Orthopedic Surgery, Seirei Sakura Citizen Hospital
2. Department of Orthopedic Surgery, Faculty of Medicine, University of Tsukuba
3. Department of Orthopedic Surgery, Toho University Sakura Medical Center
4. Department of Orthopedic Surgery, St. Marianna University, School of Medicine
5. Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University
6. Department of Orthopedic Surgery, Eastern Chiba Medical Center