1. Department of Palliative Medicine, National Cancer Center Hospital East, Kashiwa, Japan.
2. Department of Palliative Medicine, Tohoku University School of Medicine, Sendai, Japan.
3. Division of Biomarker Discovery, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center Hospital East, Kashiwa, Japan.
4. Department of Palliative and Supportive Care, Palliative Care Team, Seirei Mikatahara General Hospital, Hamamatsu, Japan.
5. Division of Cohort Consortium Research, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan.
6. Division of Health Care Research, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan.
7. Department of Palliative Care, Tokatsu Hospital, Nagareyama, Japan.