1. Division of Gastroenterology and Hepatology, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
2. Department of Anatomical, Histological, Forensic Medicine and Orthopaedics Sciences, University Sapienza of Rome, Rome, Italy
3. Unit of Hepatology, Tor Vergata University, Rome, Italy
4. Research, Richard L. Roudebush VA Medical Center, Indianapolis, Indiana, USA
5. Department of Nutrition, Texas A&M University, College Station, Texas, USA
6. Department of Movement, Human and Health Sciences, University of Rome “Foro Italico”, Rome, Italy
7. Division of Transplant Surgery, Department of Surgery, Indiana University, Indianapolis, Indiana, USA
8. Department of Medical Physiology, Texas A&M University School of Medicine, Bryan, Texas, USA