1. Division of Internal Medicine, Department of Biomedical Sciences and Human Oncology, University Medical School, Bari, Italy
2. Department of Gastroenterology, University Medical Center, Utrecht, The Netherlands
3. Division of Internal Medicine, Hospital of Bisceglie, ASL BAT, Bisceglie, Italy
4. Department of Medicine, Division of Gastroenterology and Liver Diseases, Marion Bessin Liver Research Center, Albert Einstein College of Medicine, Bronx, NY, USA