1. From the I Clinica Medica, Department of Clinical, Internal, Anesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Italy (F.V., D.P., L.L., P.P.)
2. Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy (G.C., G.D., A.O., M.V., C.M.M.)
3. Department of General Surgery Paride Stefanini, Sapienza University of Rome, Italy (R.C., F.A., F.R., F.P.).