1. Department of Neurology Mayo Clinic Scottsdale AZ USA
2. Department of Neurology Children’s Hospital of New Orleans Louisiana State University Health Sciences Center New Orleans LA USA
3. Brigham and Women’s Hospital Department of Neurology Graham Headache Center Harvard Medical School Boston MA USA
4. Library Studies University of California San Francisco San Francisco CA USA
5. Headache Journal Headache Editorial Office Plymouth MA USA
6. Department of Anesthesia, Critical Care and Pain Medicine Massachusetts General Hospital Harvard Medical School Boston MA USA
7. Child & Adolescent Headache Program Department of Neurology University of California San Francisco San Francisco CA USA