1 Section of Internal Medicine and Thromboembolic Diseases, Department of Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del sacro Cuore, Rome, Italy.
2 Section of Internal Medicine and Thromboembolic Diseases, Department of Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del sacro Cuore, Rome, Italy.. Electronic address: roberto.pola@unicatt.it.