[1] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Med,Div Hematol Oncol, Seoul, South Korea
[2] Merck Res Labs, Beijing, Peoples R China
[3] Sungkyunkwan Univ, Samsung Med Ctr, Dept Pathol, Seoul, South Korea
[4] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, SBRI, Seoul, South Korea
[5] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Seoul, South Korea
[6] Merck, Beijing, Peoples R China
[7] Merck & Co Inc, Whitehouse Stn, NJ USA
[8] Merck Res Labs, Rahway, NJ USA
[9] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Thorac Surg, Seoul, South Korea