1 Department of Gastroenterology, Hepatology and Infectious Diseases, University Hospital Düsseldorf, Heinrich Heine University, Düsseldorf, Germany. smaranda.gliga@med.uni-duesseldorf.de.
2 Department of Gastroenterology, Hepatology and Infectious Diseases, University Hospital Düsseldorf, Heinrich Heine University, Düsseldorf, Germany.
3 Institute of Virology, Heinrich Heine-University, University Hospital Düsseldorf, Düsseldorf, Germany.