1. School of Infectious and Tropical Diseases, Vita-Salute San Raffaele University, Milan, Italy
2. School of Internal Medicine, Vita-Salute San Raffaele University, Milan, Italy
3. School of Emergency Medicine, Vita-Salute San Raffaele University, Milan, Italy
4. Unit of Infectious and Tropical Diseases, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) San Raffaele Scientific Institute, Milan, Italy