1. Center for Inherited Cardiovascular Disease, Division of Cardiovascular Medicine (N.R., J.L.C., S.L.M., A.M., A.T.O.)
2. Section of Cardiac Electrophysiology, Division of Cardiovascular Medicine (E.S.Z., F.E.M.)
3. Pathology and Laboratory Medicine at the Hospital of the University of Pennsylvania, Philadelphia (M.B.P., C.D.).
4. Division of Nuclear Medicine, Department of Radiology (D.A.P.)
5. Division of Cardiovascular Medicine (J.E.R.), Perelman School of Medicine at the University of Pennsylvania, Philadelphia