1. Graduate School of Medicine, Osaka University, Osaka, Japan.
2. Department of Palliative Care, Senri-Chuo Hospital, Osaka, Japan.
3. Department of Palliative Care, Daini Kyoritsu Hospital, Kawanishi, Japan.
4. Palliative Care Surgery, Kawanishi Municipal Hospital, Kawanishi, Japan.
5. Graduate School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan.