1 Department of Rehabilitation, St Marianna University School of Medicine, Toyoko Hospital, Kanagawa, Japan. Electronic address: maimaigoat@marianna-u.ac.jp.
2 Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan.
3 Department of Rehabilitation, Kameda Medical Center, Chiba, Japan.
4 Department of Rehabilitation, National Center for Global Health and Medicine, Tokyo, Japan.