1. Department of Neurology, University of Duisburg-Essen, Essen, Germany
2. Mayo Clinic, Scottsdale, AZ
3. Department of Neurology, University of California, San Francisco, CA
4. Merck Scientific Affairs—Neuroscience, Whitehouse Station
5. Department of Neurology, ‘C. Besta’ Neurological Institute, Milan, Italy
6. Jefferson Headache Center, Philadelphia, PA
7. Houston Headache Clinic, Houston, TX
8. Ortho-McNeil Janssen Scientific Affairs, LLC, Titusville, NJ
9. Neurology, Global Clinical Development EMD Serono, Inc., Rockland, MA, USA