1. Palliative Care Team, Saku Central Hospital, Nagano, Japan.
2. Graduate School of Medicine, Kobe University, Kobe, Japan.
3. Department of Palliative Care Nursing, University of Tokyo, Tokyo, Japan.
4. Department of Palliative and Supportive Care, Palliative Care Team and Seirei Hospice, Seirei Mikatahara General Hospital, Shizuoka, Japan.