1. From the Department of Cardiovascular Medicine (G.F., T.L.M., E.J.F., R.M., V.R., X.L., Y.T., E.S., G.K.S., K.J.C., P.L.)
2. Brigham and Women’s Hospital, Harvard Medical School, Boston, MA; INSERM U1148, Laboratory for Vascular Translational Science (LVTS), Paris, France (G.F., J.-B.M., A.N.)
3. Department of Pathology (D.E., A.L.)
4. Division of Hematology/Oncology, Boston Children’s Hospital, MA (D.W.).