1. Department of Adult Nursing/Palliative Care Nursing, Graduate School of Medicine, The University of Tokyo, Tokyo
2. Department of Gastroenterology, Mitsui Memorial Hospital, Tokyo
3. Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo
4. Department of Surgical Oncology, Graduate School of Medicine, The University of Tokyo, Tokyo
5. Department of Gastroenterology and Hepatology, Kyoundo Hospital of the Sasaki Institute, Tokyo
6. Department of Palliative Nursing, Health Sciences, Tohoku University Graduate School of Medicine, Sendai, Japan