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The authors would like to add additional grant information to their article. The Funding Sources section should now read:

This work was supported by a grant from the National Research Foundation of Korea (NRF) (No. 2011-0017639), the Global Core Research Center (GCRC) grant (No. 2011-0035681), the Converging Research Center Program (No. 2011-K000975) funded by Ministry of Education, Science and Technology (MEST), Republic of Korea (H-Y. Lee), a National Institutes of Health grant R01 CA100816 (H-Y. Lee), and in part by the Department of Defense, through grants W81XWH-04-1-0142 VITAL and W8XWH-06-1-0303 BATTLE (to WKH). We thank OSI Pharmaceuticals for providing PQIP, OSI906, and erlotinib.

The authors regret these omissions.