About the Authors
- Hiroyuki Oka
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* E-mail: okah-tky@umin.ac.jp
Affiliation Department of Medical Research and Management for Musculoskeletal Pain, 22nd Century Medical & Research Center, Faculty of Medicine, University of Tokyo, Tokyo, Japan
- Ko Matsudaira
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Affiliation Department of Medical Research and Management for Musculoskeletal Pain, 22nd Century Medical & Research Center, Faculty of Medicine, University of Tokyo, Tokyo, Japan
- Tomoko Fujii
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Affiliation Department of Orthopaedic Surgery, Japan Labour, Health and Welfare Organization, Kanto Rosai Hospital, Kanagawa, Japan
- Hiroshi Okazaki
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Affiliation Department of Orthopaedic Surgery, Japan Labour, Health and Welfare Organization, Kanto Rosai Hospital, Kanagawa, Japan
- Yukari Shinkai
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Affiliation Medical Research Center, JA Kyosai Research Institute, Tokyo, Japan
- Yutaka Tsuji
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Affiliation Medical Research Center, JA Kyosai Research Institute, Tokyo, Japan
- Sakae Tanaka
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Affiliation Department of Orthopaedic Surgery, University of Tokyo, Tokyo, Japan
- Ryuichi Kato
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Affiliation Medical Research Center, JA Kyosai Research Institute, Tokyo, Japan
Competing Interests
Co-authors YS, YT and RK are employed by JA Kyosai Research Institute. There are no patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.
Author Contributions
Conceived and designed the experiments: H. Oka KM ST. Performed the experiments: TF H. Okazaki. Analyzed the data: H. Oka KM. Contributed reagents/materials/analysis tools: YS YT RK. Wrote the paper: H. Oka KM.