1. Department of Neurology Mayo Clinic Rochester MN USA
2. Department of Neurology Mayo Clinic Scottsdale AZ USA
3. American Migraine Foundation Mount Royal NJ USA
4. Department of Neurology Northwell Health, Zucker School of Medicine Hempstead NY USA
5. Lorenz & Kopf LLC Scottsdale AZ USA
6. Department of Neurology University of Toronto Toronto ON Canada
7. Department of Neurology New York University Langone Medical Center New York NY USA