1. Department of Pediatrics, Division of Pediatric Neurology, Children's Hospital of the King's Daughters, Eastern Virginia Medical School, Norfolk, Virginia
2. Department of Neurology, Palm Beach Headache Center/Palm Beach Neurology, West Palm Beach, Florida
3. Department of Neurology, Michigan Head Pain and Neurological Institute, Ann Arbor, Michigan
4. Department of Therapeutics, Johnson & Johnson Pharmaceutical Research and Development, Titusville, New Jersey
5. Department of Therapeutics, Johnson & Johnson Pharmaceutical Research and Development, Beerse, Belgium