1. Department of Palliative Care, Iizuka Hospital, Fukuoka, Japan.
2. Department of Cardiology, St. Luke's International University, Tokyo, Japan.
3. St. Luke's International Library, Tokyo, Japan.
4. Department of Cardiology, Himeji Cardiovascular Center, Himeji, Japan.
5. Department of Internal Medicine, Division of Cardiovascular Medicine, Kurume University School of Medicine, Kurume, Japan.
6. Department of Palliative Medicine, Kobe University School of Medicine, Hyogo, Japan.
7. Center for Disruptive Cardiovascular Medicine, Department for Advanced Risk Stratification for Cardiovascular Diseases, Kyushu University, Fukuoka, Japan.