1. Department of Pediatrics; Epilepsy Center; Ann & Robert H. Lurie Children's Hospital of Chicago; Chicago Illinois U.S.A
2. Department of Pediatrics; Northwestern Memorial Feinberg School of Medi-cine; Chicago Illinois U.S.A
3. Biostatistics Research Core; Stanley Manne Children's Research Institute; Ann & Robert H. Lurie Children's Hospital of Chicago; Chicago Illinois U.S.A