1. Department of Neurology Mayo Clinic Scottsdale Arizona USA
2. National Institute for Health Research (NIHR) Wellcome Trust King’s Clinical Research Facility King’s College London London UK
3. Department of Neurology University of California Los Angeles California USA
4. Department of Neurology Danish Headache Center Rigshospitalet Glostrup Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark
5. Headache Science Centre IRCCS Mondino Foundation Pavia Italy
6. Department of Brain and Behavioural Sciences University of Pavia Pavia Italy
7. Eli Lilly and Company, Indianapolis Indiana USA
8. University of Maryland School of Medicine Baltimore Maryland USA