1. General Practitioner Limbiate, 20812 Limbiate, Italy
2. School of Specialization in Hygiene and Preventive Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
3. School of Specialization in Anesthesiology and Critical Care, University of Rome Sapienza, Policlinico Umberto I, 00133 Rome, Italy
4. RSA “E.Bernardelli”, Clinica Polispecialistica San Carlo, 20037 Paderno Dugnano (Milan), Italy
5. General Practitioner ATS Lecco-Monza Barlassina, 20825 Monza Brianza, Italy
6. Clinical Pathology Department, Desio Hospital, 20832 Desio, Italy
7. Hepatology Unit “San Giuseppe-Multimedica” Hospital, University of Milan, 20123 Milan, Italy