1. Graduate School of Education, Tohoku University , Sendai, Miyagi , Japan
2. Graduate School of Human Science, Osaka University , Suita, Osaka , Japan
3. Center for Infectious Disease Education and Research (CiDER), Osaka University , Suita, Osaka , Japan
4. Department of Palliative Nursing , Health Sciences, , Sendai, Miyagi , Japan
5. Tohoku University Graduate School of Medicine , Health Sciences, , Sendai, Miyagi , Japan
6. Department of Palliative and Supportive Care, Palliative Care Team, Seirei Mikatahara General Hospital , Hamamatsu, Shizuoka , Japan
7. Department of Palliative and Supportive Care , Institute of Medicine, , Tsukuba, Ibaraki , Japan
8. University of Tsukuba , Institute of Medicine, , Tsukuba, Ibaraki , Japan
9. Department of Human Health Sciences, Kyoto University Graduate School of Medicine , Kyoto , Japan
10. Department of Palliative Medicine, Tsukuba Medical Center Hospital , Tsukuba, Ibaraki , Japan