1. Department of Child Neurology and Psychiatry, ‘‘C. Mondino National Institute of Neurology’’ Foundation, IRCCS, Pavia, Italy
2. Unit of Child Neurology and Psychiatry, Department of Public Health, Neuroscience, Experimental and Forensic Medicine, University of Pavia, Italy
3. Department of Behavioural Health Sciences, University of Pavia, Italy
4. Child Neuropsychiatry Unit, Department of Clinical and Biological Sciences, University of Insubria, Italy
5. Headache Science Center, ‘‘C. Mondino National Institute of Neurology’’ Foundation, IRCCS, Pavia, Italy