1. Fondazione I.R.C.C.S. Istituto Neurologico Carlo Besta; Neuroepidemiology Unit; Via Giovanni Celoria, 11 Milano Italy 20133
2. University of Modena and Reggio Emilia; Italian Cochrane Centre, Department of Diagnostic, Clinical and Public Health Medicine; Modena Italy
3. University of Ioannina School of Medicine; Department of Hygiene and Epidemiology; Medical School Campus University of Ioannina Ioannina Greece 45110
4. Fondazione I.R.C.C.S. Istituto Neurologico Carlo Besta; Scientific Direction; via Celoria, 11 Milano Italy 20133