1. Tokyo Rheumatism Pain Clinic, Tokyo, Japan
2. Department of Rheumatology, Tokyo Medical University Hachioji Medical Center, Tokyo, Japan
3. Faculty of Health Science, Osaka Yukioka College of Health Science, Osaka, Japan
4. Orthopaedic Surgery and Rheumatology, Hayaishi Hospital, Osaka, Japan
5. PEACE OF MIND Co., Ltd., Kumamoto, Japan
6. Duke Clinical Research Institute, Durham, North Carolina, USA
7. Japanese Organization for Medical Device Development, Inc., Tokyo, Japan