1. Geisel School of Medicine at Dartmouth Hanover New Hampshire USA
2. Dartmouth Headache Center Lebanon New Hampshire USA
3. Hartford Healthcare Headache Center Ayer Neuroscience Institute West Hartford Connecticut USA
4. Department of Neurology University of Connecticut School of Medicine Farmington Connecticut USA
5. Headache and Facial Pain Clinic Ramat‐Aviv Medical Center Tel‐Aviv Israel
6. Westport Headache Institute Westport Connecticut USA
7. Kahn‐Sagol‐Maccabi Research and Innovation Institute Maccabi Healthcare Services Tel Aviv Israel
8. BioStats Statistical Consulting Ltd. Modiin Israel
9. Tel‐Aviv University Sackler School of Medicine Tel‐Aviv Israel
10. Department of Neurology Chaim Sheba (Tel HaShomer) Medical Center Ramat Gan Israel