1. Department of Rehabilitation, Chuzan Hospital, 6-2-1 Matsumoto, Okinawa 904-2151, Okinawa, Japan
2. Department of Health and Nutrition, Okinawa University, 555 Kokuba, Naha 902-8521, Okinawa, Japan
3. Faculty of Health Sciences, Kinjo University, 1200 Kasama-machi, Hakusan 924-8511, Ishikawa, Japan
4. Faculty of Nutrition, Chuzan Hospital, 6-2-1 Matsumoto, Okinawa 904-2151, Okinawa, Japan