1. Clinical Education and Research Center, Chuzan Hospital, Matsumoto, Okinawa, Japan
2. Department of Clinical Research and Quality Management, Graduate School of Medicine, University of The Ryukyus, Nishihara-cho, Okinawa, Japan
3. Department of Rehabilitation Medicine, Chuzan Hospital, Matsumoto, Okinawa, Japan
4. Department of Rehabilitation Medicine, Aichi Medical University, Nagakute, Aichi, Japan