1. Department of Palliative Medicine, National Cancer Center Hospital East, Kashiwa, Japan;
2. bDivision of Biomarker Discovery, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center, Kashiwa, Japan;
3. cDepartment of Palliative Medicine, Osaka City General Hospital, Osaka, Japan;
4. dPalliative Care Team and Seirei Hospice, Seirei Mikatahara General Hospital, Hamamatsu, Japan;
5. eDepartment of Palliative Medicine, Suita Tokushukai Hospital, Suita, Japan;
6. fMegumi Zaitaku Clinic, Yokohama, Japan;
7. gDivision of Community-based Medicine and Primary Care, University of the Ryukyus Hospital, Okinawa, Japan;
8. hDepartment of Palliative Medicine, Shizuoka Saiseikai General Hospital, Shizuoka, Japan;
9. Saiseikai Matsusaka General Hospital, Matsusaka, Japan;
10. Department of Palliative Care, Aichi Cancer Center Hospital, Nagoya, Japan;
11. Department of Palliative Medicine, Wakayama Medical University Hospital Oncology Center, Wakayama, Japan;
12. Department of Psychosomatic Medicine, National Hospital Organization Kinki-Chuo Chest Medical Center, Sakai, Japan;
13. Matsue City Hospital, Matsue, Japan;
14. Gratia Hospital Hospice, Mino, Japan