[1] Seoul Natl Univ, Coll Med, Dept Prevent Med, Seoul, South Korea
[2] Roswell Pk Canc Inst, Dept Epidemiol, Buffalo, NY 14263 USA
[3] NCI, Div Canc Epidemiol & Genet, Bethesda, MD 20892 USA
[4] Seoul Natl Univ, Coll Med, Dept Surg, Seoul, South Korea
[5] Hallym Univ, Coll Med, Dept Social & Prevent Med, Chunchon, South Korea
[6] Univ Ulsan, Coll Med, Dept Surg, Seoul 138736, South Korea
[7] Ewha Womans Univ, Coll Med, Dept Prevent Med, Seoul 158056, South Korea
[8] Korea Natl Canc Ctr, Goyang Si 410769, Gyeonggi Do, South Korea
[9] Seoul Natl Univ, Canc Res Inst, Seoul, South Korea