1. Department of Medical and Surgical Critical Care, Thrombosis Centre, University of Florence, Italy
2. Don Carlo Gnocchi Foundation, Onlus IRCCS, Florence, Italy
3. Unita’ di Epidemiologia, Azienda Sanitaria di Firenze, ASL 10, Florence, Italy
4. Cardiology Division, Nuovo San Giovanni di Dio Hospital, Florence, Italy
5. Unit of Gerontology and Geriatric Medicine, University of Florence, Italy.