1. Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA.
2. Department of Oncology, University of Lausanne, CH-1066, Lausanne, Switzerland.
3. Ludwig Institute for Cancer Research, University of Lausanne, CH-1066, Lausanne, Switzerland.
4. Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
5. Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, WA 98109, USA.
6. Novartis Institutes for Biomedical Research, Emeryville, CA 94608, USA.