Dana-Farber/ Harvard Cancer Center, Duke University Medical Cancer Center, Georgetown University, Johns Hopkins University, Mayo Clinic Cancer Center, Montefiore Medical Center, Memorial Sloan Kettering Cancer Center, University of Alabama at Birmingham Comprehensive Cancer Center, University of California San Francisco, University of Chicago Medical Center, University of North Carolina at Chapel Hill, University of Pennsylvania, University of Pittsburgh Cancer Institute, University of Washington School of Medicine/ Fred Hutchinson Cancer Research Center, Vanderbilt University