[1] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Med,Div Hematol Oncol, Seoul, South Korea
[2] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Radiat Oncol, Seoul, South Korea
[3] Yonsei Univ, Med Ctr, Dept Internal Med, Yonsei Canc Ctr, Seoul 120749, South Korea
[4] Gachon Univ, Gil Med Ctr, Div Hematol & Oncol, Dept Internal Med, Inchon, South Korea
[5] Gachon Univ, Gil Med Ctr, Dept Radiat Oncol, Inchon, South Korea
[6] Yonsei Univ, Med Ctr, Yonsei Canc Ctr, Dept Radiat Oncol, Seoul 120749, South Korea
[7] Zhejiang Canc Hosp, Dept Radiat Oncol, Hangzhou, Zhejiang, Peoples R China
[8] Seoul Natl Univ Hosp, Dept Internal Med, Seoul 110744, South Korea
[9] St Vincents Hosp, Suwon, South Korea
[10] Ulsan Univ Hosp, Ulsan, South Korea
[11] Catholic Univ, Div Med Oncol, Dept Internal Med, Seoul St Marys Hosp, Seoul, South Korea
[12] Ajou Univ, Sch Med, Suwon 441749, South Korea
[13] Univ Ulsan, Coll Med, Dept Oncol, Asan Med Ctr, Seoul, South Korea
[14] Beijing Canc Hosp & Inst, Beijing, Peoples R China
[15] Guangdong Gen Hosp, Guangdong Lung Canc Inst, Guangzhou, Guangdong, Peoples R China
[16] Guangdong Acad Med Sci, Guangzhou, Guangdong, Peoples R China
[17] Inje Univ, Sanggye Paik Hosp, Seoul, South Korea
[18] Yeungnam Univ, Coll Med, Div Oncol Hematol, Dept Med, Daegu, South Korea
[19] Keimyung Univ, Dongsan Med Ctr, Dept Internal Med, Daegu, South Korea