1. Department of Rehabilitation, Tsurumaki-Onsen Hospital, Hadano, Kanagawa, Japan.
2. Department of Rehabilitation Medicine, Keio University Graduate School, Shinjuku, Tokyo, Japan.
3. Department of Rehabilitation Medicine, Keio University School of Medicine, Shinjuku, Tokyo, Japan.
4. Department of Biostatistics, Japanese Organisation for Research and Treatment of Cancer, Arakawa, Tokyo, Japan.
5. Mominoki Day Care Centers, Yamato, Japan.
6. Okuda Clinic, Hadano, Japan.