1. Department of Hepatology and Gastroenterology; University Hospital of Essen; Essen Germany
2. Tropical Medicine Dep.; Ain Shams University Hospital; Cairo Egypt
3. Egyptian Atomic Energy Authority; Cairo Egypt
4. Interventional Radiology Dep.; Ain Shams University Hospital; Cairo Egypt
5. Institute for Nuclear Medicine; University Hospital of Essen; Essen Germany
6. Institute for Diagnostic and Interventional Radiology and Neuroradiology; University Hospital of Essen; Essen Germany