1. Modena HIV Metabolic Clinic, University of Modena and Reggio Emilia, Modena
2. Department of Medical-Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia
3. Department of Physics, Informatics and Mathematics, University of Modena and Reggio Emilia, Modena, Italy
4. Division of Gastroenterology and Hepatology, McGill University Health Centre
5. Chronic Viral Illness Service, Division of Infectious Diseases, Department of Medicine, McGill University Health Centre, Montreal, Canada
6. Department of Internal Medicine I, Venusberg Campus 1, University Hospital Bonn, Bonn Germany
7. Infectious Diseases Clinic, Azienda Ospedaliero-Universitaria, Policlinico of Modena, Modena, Italy
8. Division of Experimental Medicine, McGill University, Montreal, Canada
9. Unit of Biostatistics and Bioinformatics, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy.