Media type: E-Article Title: GASL 2021 Contributor: Pascher, Andreas imprint: Georg Thieme Verlag KG, 2021 Published in: Zeitschrift für Gastroenterologie Language: German DOI: 10.1055/a-1331-3966 ISSN: 0044-2771; 1439-7803 Keywords: Gastroenterology Origination: Footnote: