Panconesi, Alessandro; Anselmi, Bruno; Franchi, Giancarlo; Panconesi, Alessandro, Alessandro Panconesi, Bruno Anselmi, Giancarlo Franchi, Institute of Internal Medicine IV, Headache Center, University of Florence, VI.e Pieraccini 18, 50134 Florence, Italy; Anselmi, Bruno, Alessandro Panconesi, Bruno Anselmi, Giancarlo Franchi, Institute of Internal Medicine IV, Headache Center, University of Florence, VI.e Pieraccini 18, 50134 Florence, Italy; Franchi, Giancarlo, Alessandro Panconesi, Bruno Anselmi, Giancarlo Franchi, Institute of Internal Medicine IV, Headache Center, University of Florence, VI.e Pieraccini 18, 50134 Florence, Italy