[1] IRCCS San Raffaele Roma,Headache and Pain Unit
[2] San Raffaele University,Clinical and Molecular Epidemiology
[3] IRCCS San Raffaele Roma,Headache Center Neurology Unit
[4] San Giuseppe Moscati Hospital,Unit of Neurology, Department of Medicine and Surgery, Headache Center
[5] University of Parma,Headache Center
[6] Headache Center Cardinal Massaia,Neurology Unit, IRCCS San Raffaele Scientific Institute
[7] Divisione di Neurologia,Neuroalgology Unit, Headache Center Fondazione
[8] University Magna Graecia,Headache Center
[9] IRCCS Istituto delle Scienze Neurologiche di Bologna,Headache and Neurosonology Unit
[10] San Camillo-Forlanini Hospital,undefined
[11] Vita-Salute San Raffaele University,undefined
[12] IRCCS Ospedale Policlinico San Martino,undefined
[13] IRCCS Istituto Neurologico“Carlo Besta”,undefined
[14] Headache Center San Giovanni Addolorata Hospital,undefined
[15] Headache Center San Filippo Neri Hospital,undefined
[16] ASST Santi Paolo Carlo,undefined
[17] Policlinico Universitario Campus Bio-Medico,undefined