1. From the Autonomic Medicine Section (D.S.G., P.S., J.G., R.I., S.M.), and Infections of the Nervous System Section (Y.M., A.W., B.S.) Clinical Neurosciences Program (CNP), Division of Intramural Research (DIR), National Institute of Neurological Disorders and Stroke (NINDS), NIH, Bethesda, MD; Sackler Faculty of Medicine (Y.M.), Tel Aviv University, Israel; Office of the Clinical Director (B.W., A.N.), and Viral Immunology Section (Y.E.-A., S.J.), DIR, NINDS; and Echocardiography Laboratory (M.-L.N....