Department of Systems Medicine, Division of Endocrinology, Metabolism and Diabetes & Diabetes Research Institute Federation (DRIF), CTO Hospital ASL Roma 2, University of Rome Tor Vergata, Rome, Italy. marco.infante@uniroma2.it. UniCamillus, Saint Camillus International University of Health Sciences, Rome, Italy Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Rome, Italy Department of Experimental Medicine, Clinical Biochemistry and Molecular Biology, Faculty of Medicine, University of Rome Tor Vergata, Rome, Italy Clinical Biochemistry Department, Tor Vergata University Hospital (PTV), Rome, Italy Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy Infectious Disease Clinic, Tor Vergata University Hospital (PTV), Rome, Italy