1. From the Departments of Molecular Biology (M.A.W., V.K.M.), Neurology (M.A.W.), and Medicine (V.K.M) and the Genetics Unit, Department of Pediatrics (A.K.), Massachusetts General Hospital, Howard Hughes Medical Institute (M.A.W., A.R., V.K.M.), the Division of Hematology–Oncology, Boston Children’s Hospital (C.A.L., L.S.L., V.G.S.), the Department of Pediatric Oncology, Dana–Farber Cancer Institute, Harvard Medical School (C.A.L., L.S.L., V.G.S.), the Department of Systems Biology, Harvard Medical School...