1 Headache Science Center, University Consortium for the Study of Adaptive Disorders and Headache (UCADH), Department of Brain and Behavioral Sciences, University of Pavia, IRCCS "C. Mondino", Pavia, Italy. ennio.pucci@mondino.it.
3 Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy.
4 Headache Science Center, University Consortium for the Study of Adaptive Disorders and Headache (UCADH), Department of Brain and Behavioral Sciences, University of Pavia, IRCCS "C. Mondino", Pavia, Italy.