1. Department of Rehabilitation, Yamagata City Hospital Saiseikan, Yamagata, Japan
2. Department of Orthopaedic Surgery, Bell Land General Hospital, Osaka, Japan
3. Hand and Elbow Surgery Center, Department of Orthopaedic Surgery, Kawasaki Municipal Hospital, Kawasaki, Japan
4. Niigata Hand Surgery Foundation, Niigata, Japan
5. Department of Orthopedic Surgery, Yamagata University Faculty of Medicine, Yamagata, Japan
6. Department of Physical Therapy, Yamagata Prefectural University of Health Science, Yamagata, Japan