[1] Samsung Med Ctr, Seoul, South Korea
[2] AstraZeneca, Cambridge, England
[3] Seoul Natl Univ, Bundang Hosp, Seongnam, South Korea
[4] Natl Canc Ctr, Goyang Si, South Korea
[5] Seoul Natl Univ Hosp, Seoul, South Korea
[6] Asan Med Ctr, Seoul, South Korea
[7] Chungbuk Natl Univ, Coll Med, Cheongju, South Korea
[8] Keimyung Univ, Daegu, South Korea