1 Department of Nursing, National Cancer Center Hospital East, Chiba, Japan; Section of Liaison Psychiatry and Palliative Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan. Electronic address: jkako-tky@umin.ac.jp.
2 Department of Nursing, National Cancer Center Hospital East, Chiba, Japan.
3 Department of Palliative Nursing, Health Sciences, Graduate School of Medicine, Tohoku University, Miyagi, Japan; Division of Psycho-Oncology, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center Hospital, Chiba, Japan.
4 Department of Palliative Medicine, National Cancer Center Hospital East, Chiba, Japan.