[1] Tohoku Univ, Sch Med, Dept Palliat Med, Sendai, Japan
[2] Tohoku Univ, Inst Dev Aging & Canc, Dept Clin Oncol, Sendai, Japan
[3] Tohoku Univ, Sch Med, Dept Palliat Nursing, Sendai, Japan
[4] Seirei Mikatahara Gen Hosp, Dept Palliat & Support Care, Palliat Care Team, Hamamatsu, Japan
[5] Dana Farber Canc Inst, Dept Pediat Oncol, Boston, MA USA
[6] Dana Farber Canc Inst, Ctr Populat Sci, Boston, MA USA
[7] Tohoku Univ, Grad Sch Med, Dept Clin Oncol, Sendai, Japan