1. Department of Internal Medicine Minia University Minia 61111 Egypt
2. Section of Hepatology Clinic for Gastroenterology and Rheumatology University Clinic Leipzig 04103 Leipzig Germany
3. UCL Institute for Liver and Digestive Health Royal Free Hospital and UCL London NW3 2QG UK
4. Storr Liver Centre Westmead Institute for Medical Research Westmead Hospital and University of Sydney Sydney New South Wales 2145 Australia