1. AUSL-IRCCS di Reggio Emilia, Italy
2. Department of Prevention, Provincial Agency for Health Services (APSS) of the Autonomous Province of Trento, Italy
3. Prevention of Infectious Disease Unit, Health Protection Agency Val Padana, Italy
4. School of Medicine, Vita-Salute San Raffaele University, Italy
5. Clinical Epidemiology and HTA Unit, IRCCS San Raffaele Scientific Institute, Italy