1. Headache Centers of Excellence (HCoE) Program, National Programs Center, Orange, CT 06477, USA
2. HCoE Research and Evaluation Center, Veterans Health Administration
3. Department of Neurology (Headache Medicine and Vascular Neurology) and Internal Medicine (General Medicine), Yale School of Medicine, New Haven, CT 06520, USA
4. VA Connecticut Healthcare System Department of Neurology, National Programs Center , Orange, CT 06477, USA
5. Minneapolis VA Health Care System , Minneapolis, MN 55417, USA
6. Wright-Patterson Air Force Base Mental Health Clinic , Wright-Patterson AFB, OH 45433, USA
7. Physical Medicine and Rehabilitation Service, James A. Haley Veterans’ Hospital , Tampa, FL 33612, USA
8. USAFSAM/FECN , Wright-Patterson AFB, OH 45433, USA
9. Quality and Patient Safety, Office of Evidence Based Practice, U.S. Department of Veterans Affairs , New Braunfels, TX 78132, USA
10. Department of Clinical Anesthesia, Georgetown University School of Medicine
11. Program Director Pain Fellowship, Walter Reed National Military Medical Center , Bethesda, MD 20814, USA