[1] Natl Canc Ctr, Dept Psychooncol, Chuo Ku, 5-1-1 Tsukiji, Tokyo 1040045, Japan
[2] Natl Canc Ctr, Dept Palliat Med, Chuo Ku, Tokyo, Japan
[3] Natl Canc Ctr, Dept Pharm, Chuo Ku, Tokyo, Japan
[4] Natl Ctr Global Hlth & Med, Dept Palliat Care, Shinjuku Ku, Tokyo, Japan
[5] Tokyo Metropolitan Childrens Med Ctr, Dept Psychol & Welf, Fuchu, Tokyo, Japan
[6] Open Univ Chiba, Sch Grad Studies, Program Clin Psychol, Chiba, Japan