[1] Natl Canc Ctr, Res Inst & Hosp, Proton Therapy Ctr, Goyang, South Korea
[2] Natl Canc Ctr, Res Inst & Hosp, Canc Policy Branch, Goyang, South Korea
[3] Seoul Natl Univ, Coll Med, Canc Res Inst, Seoul, South Korea
[4] Natl Canc Ctr, Res Inst & Hosp, Ctr Uterine Canc, Goyang, South Korea
[5] Natl Canc Ctr, Res Inst & Hosp, Gynecol Canc Branch, Goyang, South Korea
[6] Natl Canc Ctr, Grad Sch Canc Sci & Policy, Dept Canc Control & Policy, Goyang, South Korea
[7] Natl Canc Ctr, Res Inst & Hosp, 323 Ilsan Ro,410-769 Goyang, Gyeonggi, South Korea