1. Department of Orthopedic Surgery, Graduate School of Medical Sciences, Kanazawa University, Ishikawa 920-8641, Japan
2. Department of Orthopedic Surgery, Toyama Prefectural Central Hospital, Toyama 930-8550, Japan
3. Department of Orthopedic Surgery, Nagoya University, Graduate School of Medicine, Nagoya 466-8550, Japan
4. Department of Orthopedic Surgery, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
5. Department of Orthopedic Surgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki 305-8575, Japan
6. Department of Orthopedic Surgery, Ibaraki Seinan Medical Center Hospital, Ibaraki 306-0433, Japan
7. Department of Orthopedic Surgery, National Hospital Organization Murayama Medical Center, Tokyo 208-0011, Japan
8. Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Tokyo 160-8582, Japan
9. Department of Orthopedic Surgery, Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan
10. Department of Orthopedics and Rehabilitation Medicine, Faculty of Medical Sciences University of Fukui, Fukui 910-1193, Japan
11. Department of Orthopedic Surgery, Hamamatsu University School of Medicine, Shizuoka 431-3192, Japan
12. Department of Orthopedic Surgery, Nagoya Kyoritsu Hospital, Aichi 454-0933, Japan
13. Department of Orthopedic Surgery, Sapporo Medical University, Sapporo 060-8543, Japan
14. Department of Orthopedic Surgery, Matsuda Orthopedic Memorial Hospital, Sapporo 001-0018, Japan
15. Department of Orthopedic Surgery, Yamaguchi University Graduate School of Medicine, Yamaguchi 755-8505, Japan
16. Department of Orthopedic Surgery, Shinshu University School of Medicine, Nagano 390-8621, Japan
17. Department of Orthopedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kyoto 602-8566, Japan
18. Department of Orthopedics, Saiseikai Shiga Hospital, Shiga 520-3046, Japan
19. Department of Orthopedic Surgery, Tohoku University Graduate School of Medicine, Miyagi 980-8574, Japan
20. Department of Orthopedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan
21. Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya 467-8601, Japan
22. Department of Orthopedic Surgery, Nihon University Hospital, Tokyo 101-8393, Japan
23. Department of Orthopedic Surgery, Nihon University School of Medicine, Tokyo 173-8610, Japan
24. Department of Orthopedics, Traumatology and Spine Surgery, Kawasaki Medical School, Okayama 701-0192, Japan
25. Department of Orthopedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka 545-8585, Japan
26. Department of Orthopedic Surgery, Kitasato University School of Medicine, 1-15-1, Kanagawa 252-0374, Japan
27. Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan
28. Department of Orthopedic Surgery, Kochi Medical School, Kochi University, Nankoku 783-8505, Japan
29. Department of Orthopedic Surgery, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima 890-8520, Japan
30. Department of Orthopedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, Maebashi 371-8511, Japan
31. Department of Orthopedic Surgery, Mie University Graduate School of Medicine, Mie 514-8507, Japan
32. Department of Orthopedic Surgery, School of Medicine, International University of Health and Welfare, Chiba 286-0124, Japan
33. Department of Orthopedic Surgery, International University of Health and Welfare Narita Hospital, Chiba 286-0124, Japan
34. Department of Orthopedic Surgery and Spine and Spinal Cord Center, International University of Health and Welfare Mita Hospital, Tokyo 108-8329, Japan
35. Department of Orthopedic Surgery, The University of Tokyo Hospital, Tokyo 113-8655, Japan
36. Department of Orthopedic Surgery, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
37. Department of Orthopedics Surgery, Surgical Science, Tokai University School of Medicine, Kanagawa 259-1193, Japan
38. Department of Orthopedic Surgery, Tokyo Medical and Dental University, Yushima 113-8519, Japan
39. Department of Orthopedic Surgery, University of Yamanashi, Yamanashi 409-3898, Japan
40. Department of Orthopedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
41. Department of Orthopedic Surgery, Faculty of Medicine, University of Toyama, Toyama 930-0194, Japan
42. Department of Orthopedic Surgery, Faculty of Medicine, Oita University, Oita 879-5593, Japan
43. Department of Orthopedic Surgery, Kansai Medical University Hospital, Osaka 573-1191, Japan