1. Department of Neurology Mayo Clinic Phoenix AZ USA
2. Department of Neurology University of Southern California Los Angeles CA USA
3. Department of Neurology Thomas Jefferson University Philadelphia PA USA
4. Department of Internal Medicine University of Cincinnati Cincinnati OH USA
5. The Headache Center Ridgeland MS USA
6. Department of Neurology University of Utah Salt Lake City UT USA
7. Preferred Primary Care Physicians Pittsburgh PA USA
8. Department of Neurology University of Colorado Denver CO USA
9. Department of Neurology West Virginia University Morgantown WV USA
10. Department of Neurology University of Washington Seattle WA USA
11. Patient Advocate and Educator Washington WV USA