From the Department of Neurology (Drs. Musumeci, Naini, Shanske, De Vivo, Hirano, and DiMauro), Columbia University College of Physicians and Surgeons, New York, NY; Department of Pediatrics (Dr. Slonim and N. Skavin), North Shore University Hospital, Manhasset, NY; Department of Pediatrics (Drs. Krawiecki and Weissman), Emory University, Atlanta, GA; Children’s Hospital (Dr. Tsao), Columbus, OH; and Department of Neurology (Dr. Mendell), Ohio State University, Columbus.(2001-04-10時点)