1. Internal Medicine Department, San Gerardo Hospital, Monza, Italy.
2. Department of Health Science, Milano-Bicocca University, Milan, Italy.
3. Cardiology IV°, Cardio-thoracic-vascular Department “A. De Gasperis”, Niguarda Ca Granda Hospital, Milan, Italy.
4. Infectious Disease Department, San Gerardo Hospital, Monza, Italy.
5. Istituto di Ricovero e Cura a Carattere Scientifico Multimedica, Sesto San Giovanni, Milan, Italy.