About the Authors

Hiroki Iwahashi

Affiliation Department of Orthopaedic Surgery, Wakayama Medical University, 811–1 Kimiidera, Wakayama City, Wakayama 641–8510, Japan

Noriko Yoshimura

Affiliation Department of Joint Disease Research, 22nd Century Medical and Research Center, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113–8655, Japan

Hiroshi Hashizume

hashizum@wakayama-med.ac.jp

Affiliation Department of Orthopaedic Surgery, Wakayama Medical University, 811–1 Kimiidera, Wakayama City, Wakayama 641–8510, Japan

Hiroshi Yamada

Affiliation Department of Orthopaedic Surgery, Wakayama Medical University, 811–1 Kimiidera, Wakayama City, Wakayama 641–8510, Japan

Hiroyuki Oka

Affiliation Department of Medical Research and Management for Musculoskeletal Pain, 22nd Century Medical & Research Center, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113–8655, Japan

Ko Matsudaira

Affiliation Department of Medical Research and Management for Musculoskeletal Pain, 22nd Century Medical & Research Center, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113–8655, Japan

Kazunori Shinto

Affiliation Department of Orthopaedic Surgery, Wakayama Medical University, 811–1 Kimiidera, Wakayama City, Wakayama 641–8510, Japan

Yuyu Ishimoto

Affiliation Department of Orthopaedic Surgery, Wakayama Medical University, 811–1 Kimiidera, Wakayama City, Wakayama 641–8510, Japan

Keiji Nagata

Affiliation Department of Orthopaedic Surgery, Wakayama Medical University, 811–1 Kimiidera, Wakayama City, Wakayama 641–8510, Japan

Masatoshi Teraguchi

Affiliation Department of Orthopaedic Surgery, Wakayama Medical University, 811–1 Kimiidera, Wakayama City, Wakayama 641–8510, Japan

Ryohei Kagotani

Affiliation Department of Orthopaedic Surgery, Wakayama Medical University, 811–1 Kimiidera, Wakayama City, Wakayama 641–8510, Japan

Shigeyuki Muraki

Affiliation Department of Joint Disease Research, 22nd Century Medical and Research Center, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113–8655, Japan

Toru Akune

Affiliation Rehabilitation Services Bureau, National Rehabilitation Center for Persons with Disabilities, 1 Namiki 4-chome, Tokorozawa City, Saitama 359–8555, Japan

Sakae Tanaka

Affiliation Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113–8655, Japan

Hiroshi Kawaguchi

Affiliation Japan Community Health Care Organization Tokyo Shinjuku Medical Center, 6-1-1 Shinjuku, Shinjuku-ku, Tokyo 160–8402, Japan

Kozo Nakamura

Affiliation Rehabilitation Services Bureau, National Rehabilitation Center for Persons with Disabilities, 1 Namiki 4-chome, Tokorozawa City, Saitama 359–8555, Japan

Akihito Minamide

Affiliation Department of Orthopaedic Surgery, Wakayama Medical University, 811–1 Kimiidera, Wakayama City, Wakayama 641–8510, Japan

Yukihiro Nakagawa

Affiliation Department of Orthopaedic Surgery, Wakayama Medical University, 811–1 Kimiidera, Wakayama City, Wakayama 641–8510, Japan

Munehito Yoshida

Affiliation Department of Orthopaedic Surgery, Wakayama Medical University, 811–1 Kimiidera, Wakayama City, Wakayama 641–8510, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HI NY HH HO HY AM YN MY KM TA ST HK K. Nakamura. Performed the experiments: HI NY HH HO KS YI K. Nagata MT RK SM. Analyzed the data: HI NY HH HO. Contributed reagents/materials/analysis tools: HI NY HH HO. Wrote the paper: HI.