1. Department of Palliative and Supportive Care, Palliative Care Team, Seirei Hospice, Hamamatsu, Shizuoka, Japan.
2. Department of Internal Medicine, National Tokyo Medical Center, Tokyo, Japan.
3. Division of General Internal Medicine and Clinical Epidemiology, Kyoto Univesity Hospital, Kyoto, Japan.
4. Psycho-Oncology Division, Research Center for Innovative Oncology, National Cancer Center Research Institute East, Chiba, Japan.
5. Department of Palliative Medicine, Shizuoka Cancer Center, Shizuoka, Japan.