1. Department of Palliative and Supportive Care, Institute of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.
2. Department of Palliative Nursing, Health Sciences, Graduate School of Medicine, Tohoku University, Sendai, Miyagi, Japan.
3. Department of Human Health Sciences, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan.
4. Hospice Palliative Care Japan, Ashigarakami, Kanagawa, Japan.
5. Department of Palliative and Supportive Care, Seirei Mikatahara General Hospital, Hamamatsu, Japan.
6. Research Association for Community Health, Hamamatsu, Japan.