1. Department of Palliative and Supportive Care and Seirei Hospice, Seirei Mikatahara General Hospital, Hamamatsu, Japan.
2. Department of Palliatives/Gerontology Nursing, School of Human Health Science, Kyoto University Graduate School of Medicine, Kyoto, Japan.
3. Peace House Hospice, Ashigarakami-gun, Japan.
4. Division of Nursing, School of Health Sciences, Niigata University, Niigata, Japan.
5. Palliative Care Support Group NPO, Higashikurume, Japan.
6. Hamamatsu Cancer Support Center, Seirei Mikatahara General Hospital, Hamamatsu, Japan.
7. Cancer Centre, Yodogawa Christian Hospital, Osaka, Japan.
8. Department of Palliative Nursing, Tohoku University Graduate School of Medicine, Sendai, Japan.
9. Division of Biostatistics, Tohoku University Graduate School of Medicine, Sendai, Japan.
10. Department of Neuropsychiatry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.