Dr. Petersen is a Professor of Medicine and Head of the Liver Unit at the IFI Institute for Interdisciplinary Medicine at the Asklepios Klinik St. George, University of Hamburg, Germany. He received his clinical training at the University of Hamburg, Mount Sinai Medical School, New York, USA, Tulane Medical School, Louisiana, USA and University of Zurich, Switzerland. He is board certified in Internal Medicine, Gastroenterology and Infectious diseases. Dr. Petersen was a research fellow for several years with grant support from the German Research Foundation and the NIH, USA, at the Liver Center of the Albert Einstein College of Medicine, New York.

Dr. Petersen is actively involved in laboratory and clinical research in viral hepatitis and co- leads a work group for the development of novel antiviral techniques in hepatitis B and C. He was a member of the Governing Board of the European Association for the Study of the Liver (EASL) from 2006 to 2009 and he is now acting as an Associated Editor of the Journal of Hepatology, responsible for translational and clinical HBV papers and for clinical HCV papers. He has published more than 100 papers in the field of viral hepatitis and liver diseases and has received a number of honours. He co-authored the recent update of the German guidelines for the diagnosis and treatment of hepatitis B and he was on the review board for the EASL Hepatitis B Clinical Practice Guidelines.