[1] Hosp Goyang, Palliat Care Clin, Natl Canc Ctr, Goyang, South Korea
[2] Hosp Goyang, Natl Canc Ctr, Family Med Clin, Goyang, South Korea
[3] Natl Canc Ctr, Natl Canc Control Inst, Hosp Palliat Care Branch, Goyang Si 410769, Gyeonggido, South Korea
[4] Natl Canc Ctr, Natl Canc Control Inst, Div Canc Management Policy, Goyang, South Korea