1. Heart Failure Center, Hiroshima University Hospital, Hiroshima, Japan
2. Department of Rehabilitation, Division of Clinical Support, Hiroshima University Hospital, Hiroshima, Japan
3. Department of Cardiovascular Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
4. Hiroshima Integrated Community Care System Promotion Center, Hiroshima, Japan
5. Department of Rehabilitation Medicine, Hiroshima University Hospital, Hiroshima, Japan
6. Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan