1. Department of Palliative and Supportive Care, Yokohama Minami Kyosai Hospital, Yokohama City, Japan.
2. Department of Palliative Medicine, Shinjo Clinic, Kobe City, Japan.
3. Department of Palliative and Supportive Care, Seirei Mikatahara General Hospital, Hamamatsu City, Japan.
4. Department of Palliative Medicine, Hiroshima Prefectural Hospital, Hiroshima City, Japan.
5. Department of Palliative Care, Saitama Cancer Center, Ina-machi, Japan.