1. Department of Neurology, Lewis Headache Center Barrow Neurological Institute, St. Joseph's Hospital and Medical Center Phoenix Arizona USA
2. Department of Neurology University of Florida Gainesville Florida USA
3. Global Specialty R&D, Neuroscience at Teva Pharmaceuticals West Chester Pennsylvania USA
4. Department of Neurology, Henry Ford Health System Wayne State University School of Medicine Detroit Michigan USA
5. Department of Neurology University of Colorado Denver SOM Aurora Colorado USA
6. Department of Neurology and Ophthalmology Michigan State University College of Human Medicine East Lansing Michigan USA
7. Department of Neurology University of Missouri St. Louis Missouri USA
8. Department of Neurology, Hospital das Clínicas University of São Paulo São Paulo Brazil