Claudia Altamura1, Matteo Paolucci2, Fabrizio Vernieri2. 1. Neurology Department, Headache and Neurosonology Unit, Campus Bio-Medico University of Rome, Rome, Italy. c.altamura@unicampus.it. 2. Neurology Department, Headache and Neurosonology Unit, Campus Bio-Medico University of Rome, Rome, Italy.