1. From the Department of Biochemistry, Weill Cornell Medical College, New York, NY (R.K.S., A.S.H., A.A., V.C.B.-L., I.G., H.F.C., F.R.M.)
2. Vascular Biology Program, Boston Children’s Hospital and Department of Surgery, Harvard Medical School, Boston, MA (Y.X., T.H.).
3. Current address: Thoracic Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY (Y.X.).