1. Headache Science Center, C. Mondino National Neurological Institute, Pavia, Italy
2. Università del Piemonte Orientale “A. Avogadro”, Department of Pharmaceutical Sciences, Italy
3. Department of Neurology, DKD HELIOS Klinik Wiesbaden, Germany
4. Deptartment of Brain and Behavioral Sciences, University of Pavia, Italy