1Medizinische Fakultät, Zentrum für Innere Medizin, Klinik für Gastroenterologie, Hepatologie und Infektiologie, Leipziger Straße 44, D-39120 Magdeburg, Germany
2INSERM U853, Bordeaux, France
3Adelaide and Meath Hospital, Trinity College, Dublin, Ireland
4University of Bologna, Bologna, Italy
5Aberdeen University, Aberdeen, UK
6VA Medical Center, Houston, Texas, USA.
7McMaster University, Hamilton, Ontario, Canada
8Henry-Dunant Hospital, Athens, Greece
9University of Wisconsin Medical School, Milwaukee, USA
10Erasmus MC, University Medical Center, Rotterdam, Netherlands