1. From the Divisions of Neurosurgery (G.G.H., B.C.K., P.B.S.) and Plastic and Reconstructive Surgery (J.A.T.), Children’s Hospital of Philadelphia, and the Department of Neurosurgery, Hospital of the University of Pennsylvania (G.G.H., P.J.M., T.M.F., B.C.K., P.B.S.) — both in Philadelphia.