1. Graduate School of Pharmaceutical Science, Osaka University Hospital, Osaka, Japan.
2. Department of Palliative Medicine, Osaka University Hospital, Osaka, Japan.
3. Department of Psychiatry, Osaka University Hospital, Osaka, Japan.
4. Department of Anesthesiology and Intensive Care Medicine, Graduate School of Medicine, Osaka University Hospital, Osaka, Japan.
5. Department of Nursing, Osaka University Hospital, Osaka, Japan.