1. Department of Clinical Medicine and Surgery, Gastroenterology Unit, University of Naples Federico II, Naples, Italy;
2. Liver Unit, ‘A.Cardarelli’ Hospital, Naples, Italy;
3. XeptagenSpA, Venice, Italy;
4. Department of Clinical and Experimental Medicine ‘F. Magrassi and A. Lanzara’, Gastroenterology Unit, Second University of Naples, Naples, Italy