1. Department of Palliative Medicine, National Cancer Center Hospital, Tokyo, Japan
2. Department of Palliative Medicine, Yokohama City University Hospital, Yokohama, Japan
3. Department of Biostatistics, JORTC Data Center, Tokyo, Japan
4. Department of Palliative and Supportive Care, St. Mary’s Hospital, Kurume, Japan
5. Department of Palliative Care, Senri-Chuo Hospital, Toyonaka, Japan
6. Department of Palliative Medicine, Kobe University, Kobe, Japan
7. Department of Palliative and Supportive Care, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
8. Department of Palliative and Supportive Care, Palliative Care Team and Seirei Hospice, Seirei Mikatahara Hospital, Hamamatsu, Japan