1. Department of Palliative Nursing, Health Sciences, Tohoku University Graduate School of Medicine, Miyagi, Japan.
2. Department of Adult Nursing/Palliative Care Nursing, School of Health, Sciences and Nursing, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
3. Department of Palliative and Supportive Care, Palliative Care Team, and Seirei Hospice, Seirei Mikatahara General Hospital, Hamamatsu, Shizuoka, Japan.
4. Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
5. Department of Palliative Medicine, Tsukuba Medical Center Hospital, Tsukuba, Ibaraki, Japan.