1. Nagoya University Graduate School of Medicine, Nagoya, Japan
2. Japanese Red Cross Nagoya Daini Hospital, Nagoya, Japan
3. Chubu Rosai Hospital, Nagoya, Japan
4. Konan Kousei Hospital, Aichi, Japan
5. Toyohashi Municipal Hospital, Aichi, Japan
6. National Center for Geriatrics and Gerontology, Aichi, Japan
7. Anjo Kosei Hospital, Aichi, Japan
8. Hachiya Orthopaedic Hospital, Nagoya, Japan
9. Japanese Red Cross Nagoya Daiichi Hospital, Nagoya, Japan
10. Kariya Toyota General Hosptal, Aichi, Japan