1. Department of Palliative Nursing, Health Sciences, Tohoku University Graduate School of Medicine, Sendai, Japan
2. Department of Nursing, Nagoya University Graduate School of Medicine, Nagoya, Japan
3. Department of Gerontological and Home Healthcare Nursing, Course of Nursing, Tohoku University Graduate School of Medicine, Sendai, Japan
4. Division of Palliative and Supportive Care, Seirei Mikatahara General Hospital, Hamamatsu, Japan