1. Department of Psycho-Oncology, National Cancer Center Hospital, Chuo-ku, Japan.
2. Department of Palliative Medicine, and National Cancer Center Hospital, Chuo-ku, Japan.
3. Department of Pharmacy, National Cancer Center Hospital, Chuo-ku, Japan.
4. Department of Palliative Care, National Center for Global Health and Medicine, Shinjuku-ku, Japan.
5. Department of Psychology and Welfare, Tokyo Metropolitan Children's Medical Center, Fuchu, Japan.
6. Program of Clinical Psychology, School of Graduate Studies, The Open University of Chiba, Japan.