- Correspondence to Ji-Youn Han, Center for Lung Cancer of National Cancer Hospital and Lung Cancer Branch of National Cancer Center Research Institute, National Cancer Center, 323 Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-769, Republic of Korea;
- Accepted June 9, 2011
- First published July 1, 2011.
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