[1
]From the Clinical Neurocardiology Section (D.S.G., G.E.), National Institute of Neurological
Disorders and Stroke, National Institutes of Health, Bethesda, Md; the Johns Hopkins
University School of Medicine (J.A.F., G.W.), Baltimore, Md; and Pediatric and Reproductive
Endocrinology Branch (K.P.), National Institute of Child Health and Development, National
Institutes of Health, Bethesda, Md.