1. Seirei Hospice, Seirei Mikatabara Hospital, Shizuoka, Japan.
2. Department of Internal Medicine, National Tokyo Medical Center, Tokyo, Japan.
3. Department of Palliative Medicine, Shizuoka Cancer Center Hospital, Shizuoka, Japan.
4. Psycho-Oncology Division, National Cancer Center Research Institute East, Shizuoka, Japan, Psychiatry Division, National Cancer Center Hospital East, Kashiwa, Japan, on behalf of Sedation Guideline Task Force in Japan.