Headache

• Rigshospitalet-Glostrup — Glostrup Municipality, Nordre Ringvej 57, Denmark

• University of Alabama Birmingham — Birmingham, Alabama, United States
• Doheny Eye Center, University of Southern California — Los Angeles, California, United States
• The Eye Care Group, PC — Waterbury, Connecticut, United States
• Bascom Palmer Eye Institute, University of Miami — Miami, Florida, United States

Not specified

• University of Washington — Seattle, Washington, United States

• Seattle Children's Hospital — Seattle, Washington, United States

• University of Maryland School of Dentistry — Baltimore, Maryland, United States
• Johns Hopkins University, Bayview Medical Campus — Baltimore, Maryland, United States

• Montefiore Medical Center — The Bronx, New York, United States

• Boston Children's Hospital — Boston, Massachusetts, United States
• Boston Children's Hospital at Waltham — Waltham, Massachusetts, United States

• 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

Not specified