Headache Disorders, Primary

• Alabama Clinical Therapeutics — Birmingham, Alabama, United States
• University of South Alabama Neurology — Mobile, Alabama, United States
• Little Rock Family Practice Clinic — Little Rock, Arkansas, United States
• C. Phillip O'Carroll, MD, Inc. — Newport Beach, California, United States

• CHU Lariboisière, AP-HP, Centre des Urgences Céphalées (Emergency Headacha Center) — Paris, Île-de-France Region, France

• Monarch Medical Research - Child and Adolescent Neurology — Norfolk, Virginia, United States

• University of Alabama at Birmingham — Birmingham, Alabama, United States

• University of Kansas Medical Center — Kansas City, Kansas, United States
• Children's Mercy Hospital Kansas City — Kansas City, Missouri, United States

• Glostrup Hospital, Faculty of Health Sciences, University of Copenhagen — Glostrup Municipality, Denmark

Not specified

• Capnia Investigative Site — Birmingham, Alabama, United States
• Capnia Investigative Site — Stanford, California, United States
• Capnia Investigative Site — East Hartford, Connecticut, United States
• Capnia Investigative Site — West Palm Beach, Florida, United States

• Northport, Alabama, United States
• Phoenix, Arizona, United States
• Little Rock, Arkansas, United States
• Berkeley, California, United States

• Anaheim, California, United States
• San Francisco, California, United States
• Clearwater, Florida, United States
• DeLand, Florida, United States