1. From the Department of Neurology (H.J.F.), Department of Pediatrics (H.J.F.), and Department of Biostatistics and Epidemiology (N.K.H.), University of California, San Francisco; Department of Epidemiology (J.M.L., R.T., W.I.L., M.S.V.E.) and Department of Neurology (M.S.V.E.), Columbia University College of Physicians and Surgeons, New York, NY; Department of Radiology, Stanford University, Palo Alto, CA (M.W., Y.L.); Department of Pediatrics (Infectious Disease), Kaiser Permanente, Oakland, CA (C.G...