[1] Natl Canc Ctr Hosp East, Dept Palliat Med, Kashiwa, Chiba, Japan
[2] Natl Canc Ctr Hosp East, Dept Thorac Oncol, Kashiwa, Chiba, Japan
[3] Natl Canc Ctr, Ctr Publ Hlth Sci, Tokyo, Japan
[4] Natl Canc Ctr, Innovat Ctr Support Palliat & Psychosocial Care, Tokyo, Japan
[5] Keio Univ, Dept Neuropsychiat, Sch Med, Tokyo, Japan
[6] Natl Canc Ctr Hosp East, Nursing Div, Kashiwa, Chiba, Japan
[7] Canc Inst Hosp Japanese Fdn Canc Res, Div Psychooncol, Tokyo, Japan
[8] Natl Canc Ctr Hosp East, Res Ctr Innovat Oncol, Psychooncol Div, Kashiwa, Chiba, Japan
[9] Tokatsu Hosp, Dept Palliat Med, Chiba, Japan
[10] Univ Tokyo, Grad Sch Med, Dept Stress Sci & Psychosomat Med, Tokyo, Japan
[11] Univ Tokyo, Sch Publ Hlth, Grad Sch Med, Dept Biostat, Tokyo, Japan
[12] Seirei Mikatahara Gen Hosp, Dept Palliat & Support Care, Hamamatsu, Shizuoka, Japan
[13] Natl Canc Ctr, Dept Thorac Oncol, Tokyo, Japan