Chronic Migraine

• Newport Beach Clinical Research Associates, Inc. — Newport Beach, California, United States
• California Medical Clinic for Headache — Santa Monica, California, United States
• Hartford Healthcare Center — Hartford, Connecticut, United States
• Headache Neurology Research Institute — Ridgeland, Mississippi, United States

• University Hospital — Toulouse, France

• Headache Center, Teipei Veterans General Hospital — Taipei, Taiwan

• Clinvest/A Division of Banyan Group, Inc. — Springfield, Missouri, United States

Not specified

• Ircss Mondino Foundation — Pavia, Italy

• StudyMetrix — City of Saint Peters, Missouri, United States
• Clinvest Research, LLC — Springfield, Missouri, United States

• Federal University of Paraiba — João Pessoa, Paraíba, Brazil

• Salford Royal NHS Foundation Trust — Manchester, United Kingdom

• Clinvest/A Division of Banyan Group, Inc. — Springfield, Missouri, United States
• Renown Institute of Neurosciences — Reno, Nevada, United States
• Dent Neurologic Institute — Amherst, New York, United States
• Baylor University Medical Center — Dallas, Texas, United States