1. From the Massachusetts General Hospital Cancer Center (N.R., M.V.M.), Beth Israel Deaconess Medical Center (J.R.), and Dana–Farber Cancer Institute and Veterans Affairs Boston Healthcare System (N.M.), Boston, and Bluebird Bio, Cambridge (A.T., L.-P.L., R.A.M., K.F., M.M., F.P., M.T.Q.) — all in Massachusetts; Sarah Cannon Research Institute and Tennessee Oncology, Nashville (J.B.); Mayo Clinic, Rochester, MN (Y.L.); Hackensack University Medical Center, Hackensack (D.S.), and Celgene, Summit (J.W., G.R....