1. Department of Community Health, Health Sciences, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai, Miyagi, Japan
2. Palliative Care Team, Department of Palliative and Supportive Care, Seirei Mikatahara General Hospital, Kita-ku, Hamamtsu, Shizuoka, Japan
3. Department of Palliative Medicine, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
4. Department of Palliative Medicine, Palliative Care Center, Kyoto University Hospital, Shogoin, Saikyo-ku, Kyoto, Japan
5. Home Care Service, Department of Palliative Medicine, Tsukuba Medical Center Foundation, Tsukuba Medical Center Hospital, Tsukuba, Ibaraki, Japan
6. Department of Palliative Nursing, Health Sciences, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai, Miyagi, Japan