1. Department of Immunology and Microbial Pathogenesis, Memorial Sloan-Kettering Cancer Center, New York, NY;
2. Cancer Program, Broad Institute of MIT and Harvard, Cambridge, MA;
3. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA;
4. Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, New York, NY;
5. Department of Human Pathology and Oncology, University of Siena, Siena, Italy; and
6. Department of Pathology, Northwestern University, Chicago, IL