Corresponding Author: Prof. Dr. Ursula Seidler and Dr. Katerina Nikolovska

Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Carl Neuberg Straße 1, D 30625 (Germany)
Tel. +49 511 532 9427, Fax +49 511 532 8428, E-Mail Seidler.Ursula@mh-hannover.de; Nikolovska.Katerina@mh-hannover.de ,