[1] Sungkyunkwan Univ, Sch Med, Total Healthcare Ctr, Kangbuk Samsung Hosp, Seoul, South Korea
[2] Natl Canc Ctr, Ctr Canc Prevent & Detect, Goyang, South Korea
[3] Natl Canc Ctr, Canc Epidemiol Branch, Res Inst, Goyang, South Korea
[4] Korea Ctr Dis Control & Prevent KCDC, Choongchung Buk Do, South Korea
[5] Natl Canc Control Inst, Goyang, South Korea