1. Department of Psychiatry and Cognitive-Behavioral Medicine, Nagoya City University Graduate School of Medical Sciences, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, Japan
2. Division of Psycho-oncology and Palliative Care, Nagoya City University Hospital, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, Japan
3. Department of Palliative Care, National Hospital Organization Osaka National Hospital, 2-1-14, Hoenzaka, Chuo-ku, Osaka, Japan
4. Department of Palliative Medicine, Higashi-Osaka Hospital, Chuo, Joto-ku, Osaka, Japan
5. Clinical Research Management Center, Nagoya City University Hospital, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, Japan