1. Massachusetts General Hospital Cancer Center, Department of Medicine and Harvard Medical School, Boston, MA 02114, USA.
2. Dana-Farber Cancer Institute, Department of Biological Chemistry and Molecular Pharmacology and Harvard Medical School, Boston, MA 02115, USA.
3. Chemical Kinomics Research Center, Korea Institute of Science and Technology, Seoul, 136-791, South Korea.
4. Massachusetts General Hospital Cancer Center, Department of Pathology and Harvard Medical School, Boston, MA 02114, USA.