1. Institute of Neurology and Neurosurgery at St. Barnabas; Livingston New Jersey U.S.A
2. Departments of Neurology and Pediatrics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania U.S.A
3. Department of Neurology; University of California; San Francisco California U.S.A
4. Department of Pediatrics & Communicable Diseases; University of Michigan; Ann Arbor Michigan U.S.A
5. Department of Neurology; Montefiore Medical Center; New York New York U.S.A