1. Division of Clinical Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
2. Department of Palliative and Supportive Care, Palliative Care Team and Seirei Hospice, Seirei Mikatahara Hospital, Shizuoka, Japan
3. Yamato Clinic, Ibaraki, Japan
4. Center for Palliative and Supportive Care, University of Tsukuba Hospital, Ibaraki, Japan
5. Department of Palliative Nursing, Health Science, Tohoku University Graduate School of Medicine, Miyagi, Japan
6. Department of Palliative Medicine, Osaka University Graduate School of Medicine, Osaka, Japan