1. From the Department of Internal Medicine, Cardioangiology, and Hepatology, the Department of Angiology and Blood Coagulation, and the Division of Geriatric Medicine, University Hospital Sant'Orsola-Malpighi, Bologna, Italy; the Laboratory of Immunology and Genetics and the Laboratory for Biocompatibility Research on Implant Materials, Rizzoli Orthopaedic Institute, Bologna, Italy; and the Departm