1 Division of Rehabilitation Medicine, Kobe University Hospital, Kobe, Japan; Department of Public Health, Kobe University Graduate School of Health Sciences, Kobe, Japan.
2 Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan. Electronic address: seimik@med.kobe-u.ac.jp.
3 Department of Public Health, Kobe University Graduate School of Health Sciences, Kobe, Japan.
4 Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.