1. Department of Neurology Danish Headache Center Faculty of Health and Medical Sciences Rigshospitalet Glostrup University of Copenhagen Copenhagen Denmark
2. NIHR/Wellcome Trust King's Clinical Research Facility King's College London London UK
3. Department of Neurology University of California Los Angeles CA USA
4. Department of Neurology Charité–Universitätsmedizin Berlin Berlin Germany
5. Jefferson Headache Center Thomas Jefferson University Philadelphia PA USA
6. Department of Neurology Mayo Clinic Scottsdale AZ USA
7. Amgen Inc. Thousand Oaks CA USA