1. From the Ludwig Center, Memorial Sloan-Kettering Cancer Center, New York (J.D.W., M.K.C., M.A.P., N.A.R., A.M.L., N.H.S., C.E.A., R.-A.G., S.A.K., B.U.A.); Yale University School of Medicine and Smilow Cancer Center, Yale–New Haven Hospital, New Haven, CT (H.K., K.R., M.M.B., A.C., M.S.); Dako North America, Carpinteria (X.Z.), and Bristol-Myers Squibb, Redwood City (A.J.K.) — both in California; and Bristol-Myers Squibb, Princeton, NJ (I.L., H.D.I., W.F., C.E.H., Q.H., J.M.W., A.G.).