1. King’s College London, Headache Group, NIHR King’s Clinical Research, London, UK
2. Department of Neurology, University of California, Los Angeles, CA, USA
3. Faculty of Medine, University of Münster, Münster, Germany
4. Department of Neurology, University of California, San Francisco, California, USA
5. Albert Einstein College of Medicine, Bronx, NY, USA
6. University of Hamburg, Hamburg, Germany
7. Vall d’Hebrón University Hospital, Barcelona, Spain
8. Headache Research, University of Liège, Liège, Belgium
9. Department of Neurology, Mayo Clinic, Phoenix, AZ, USA
10. Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
11. IRCCS Mondino Foundation, Headache Science Center, Pavia, Italy
12. Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands
13. Department of Neurology, Taipei-Veterans General Hospital, Taipei, Taiwan
14. College of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan