1. Department of Pediatrics (Neurology); Duke Children's Hospital; Durham North Carolina U.S.A
2. Departments of Neurology and Pediatrics; Montefiore Medical Center; Albert Einstein College of Medicine; Bronx New York U.S.A
3. Department of Epidemiology and GH Sergievsky Center; Columbia University; New York New York U.S.A
4. Department of Neurology; Ann & Robert H. Lurie Children's Hospital of Chicago; Chicago Illinois U.S.A
5. Department of Pediatrics (Neurology); Children's Hospital Los Angeles; Los Angeles California U.S.A
6. Department of Neurology; Children's Hospital of The King's Daughters and Eastern Virginia Medical School; Norfolk Virginia U.S.A
7. Department of Neurology; Virginia Commonwealth University; Richmond Virginia U.S.A
8. Department of Biostatistics and International Epilepsy Consortium; Virginia Commonwealth University; Richmond Virginia U.S.A