1. Internal Medicine, “San Giovanni Bosco” Hospital, Torino
2. Department of Pathophysiology and Transplantation, University of Milan, IRCCS Fondazione Ospedale Maggiore Policlinico Cà Granda, Milan
3. Department of Internal Medicine I, Arcispedale S. Maria Nuova, Reggio Emilia
4. Medical Department, “Civile” Hospital, Legnano
5. Internal Medicine, “Fatebenefratelli” Hospital, Benevento
6. Internal Medicine, “F. Veneziale” Hospital, Isernia
7. FADOI Foundation, Research Department, Milan
8. Section of Medical Statistics and Biometry “GA Maccacaro,” Department of Clinical Science and Community, University of Milan, Milan
9. Department of Internal Medicine, Hospital “Maggiore della Carità,” Novara; all in Italy