[1] Yonsei Univ Hlth Syst, Yonsei Canc Ctr, Dept Pediat Hematol Oncol, Seoul, South Korea
[2] Yonsei Univ Grad Sch, Dept Nursing, Seoul, South Korea
[3] Yonsei Univ Hlth Syst, Palliat Care Ctr, Yonsei Canc Ctr, Seoul, South Korea
[4] Yonsei Univ, Coll Nursing, Brain Korea FOUR Project 21, Seoul, South Korea
[5] Yonsei Univ Coll Med, Dept Pediat, Seoul, South Korea
[6] Yonsei Univ Coll Med, Yonsei Canc Ctr, Dept Internal Med, Div Med Oncol, Seoul, South Korea
[7] Yonsei Univ Coll Med, Grad Sch Med Sci, Dept Internal Med, Brain Korea Project 21, Seoul, South Korea
[8] Provider Partners Hlth Plan, Linthicum Hts, MD USA
[9] Yonsei Univ Hlth Syst, Palliat Care Ctr, Yonsei Canc Ctr, Yonsei Ro 50-1, Seoul 03722, South Korea