1. Center for Cancer Research, National Cancer Institute, Bethesda, MD;
2. Aarhus University Hospital, Aarhus, Denmark;
3. Massachusetts General Hospital Cancer Center and Harvard Medical School, Boston, MA;
4. Vanderbilt-Ingram Cancer Center, Nashville, TN;
5. University of Pennsylvania, Philadelphia, PA;
6. University of Utah, Salt Lake City, UT;
7. Hôpital Européen Georges Pompidou, Paris, France;
8. University of Michigan, Ann Arbor, MI;
9. University of Pittsburgh, Pittsburgh, PA;
10. Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom;
11. Merck & Co., Inc., Kenilworth, NJ;
12. The University of Texas MD Anderson Cancer Center, Houston, TX;