1. VA Connecticut Healthcare System West Haven Connecticut USA
2. Warren Alpert Medical School of Brown University Providence Rhode Island USA
3. Harvard T.H. Chan School of Public Health Boston Massachusetts USA
4. Headache Centers of Excellence Research and Evaluation Center Veterans Health Administration West Haven Connecticut USA
5. Richard L. Roudebush VA Medical Center Indianapolis Indiana USA
6. Indiana University School of Medicine Indianapolis Indiana USA
7. Regenstrief Institute, Inc. Indianapolis Indiana USA
8. Westport Headache Institute Westport Connecticut USA
9. Pain, Research, Informatics, Medical Comorbidities, and Education (PRIME) Center West Haven Connecticut USA
10. Yale School of Medicine New Haven Connecticut USA
11. Ferkauf Graduate School of Psychology Yeshiva University Bronx New York USA
12. The Saul R. Korey Department of Neurology Albert Einstein College of Medicine Bronx New York USA