1 Neurology, Public Health and Disability Unit, Neurological Institute C. Besta, Via Celoria 11, 20133, Milan, Italy. chiara.scaratti@istituto-besta.it.
2 Department of Medical Information Processing, Biometry and Epidemiology (IBE), Chair for Public Health and Health Services Research, Research Unit for Biopsychosocial Health, Ludwig-Maximilians-Universität (LMU), Munich, Germany.
3 Neurology, Public Health and Disability Unit, Neurological Institute C. Besta, Via Celoria 11, 20133, Milan, Italy.