[1] C Mondino Fdn, Natl Neurol Inst, Headache Sci Ctr, Pavia, Lombardia, Italy
[2] Univ Pavia, Pavia, Lombardia, Italy
[3] Carlo Besta Neurol Inst & Fdn, Headache Ctr, Milan, Lombardia, Italy
[4] Univ Bari Aldo Moro, Neurophysiol & Pain Unit, Bari, Puglia, Italy
[5] IRCCS, Ist Sci Neurol Bologna, Bologna, Emilia Romagna, Italy
[6] Sapienza Univ, Dept Clin & Mol Med, Rome, Lazio, Italy
[7] Univ Turin, Dept Neurosci, Turin, Piemonte, Italy
[8] Univ Hosp Careggi, Headache Ctr, Florence, Toscana, Italy
[9] IRCCS Neuromed, Pozzilli Is, Molise, Italy
[10] Santa Maria della Misericordia Hosp, Neurol Clin, Perugia, Umbria, Italy
[11] ElectroCore LLC, Basking Ridge, NJ USA
[12] IRCCS San Raffaele Pisana, Headache & Pain Unit, Rome, Lazio, Italy