1. From the Emergency Department ASST Lodi Lodi (LO)Italy
2. the Laboratory of Clinical Epidemiology Department of Public Health Istituto di Ricerche Farmacologiche Mario Negri IRCCS Ranica (BG)Italy
3. Accident and Emergency Services ASST Santi Paolo e Carlo Milano (MI)Italy
4. Emergency Department and Medicine ASST Papa Giovanni XXIII Bergamo (BG)Italy
5. Pronto Soccorso e Medicina d’Urgenza Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico MilanoItaly
6. and the Università degli Studi di Milano Milano (MI) Italy