1 Department of Neurology, G. Salvini Hospital, Garbagnate Milanese, Italy. ACoppola@asst-rhodense.it.
2 Headache Center, G. Salvini Hospital, Garbagnate Milanese, Italy. ACoppola@asst-rhodense.it.
3 Department of Neurology and Headache Center, G. Salvini Hospital, Viale E. Forlanini 95, 20024, Garbagnate Milanese, Italy. ACoppola@asst-rhodense.it.
4 Service of Neurology and Headache Center, S. Carlo Clinic, Paderno Dugnano, Italy.