1. Departments of Internal Medicine, Hyogo Rehabilitation Center Hospital, 1070 Akebono-cho, Nishi-ku, Kobe 651-21, Japan.
2. Rehabilitation Medicine, Hyogo Rehabilitation Center Hospital, 1070 Akebono-cho, Nishi-ku, Kobe 651-21, Japan.
3. Faculty of Health Science, Kobe University School of Medicine