1. Department of Rehabilitation, Sapporo Maruyama Orthopedic Hospital, Sapporo, Hokkaido, Japan
2. Department of Physical Therapy, Saitama Prefectural University, Koshigaya, Saitama, Japan
3. Division of Radiology and Nuclear Medicine, Sapporo Medical University Hospital, Sapporo, Hokkaido, Japan
4. Department of Orthopedics, Sapporo Maruyama Orthopedic Hospital, Sapporo, Hokkaido, Japan