J-Matthias Löhr; Beuers Ulrich; Vujasinovic Miroslav; Alvaro Domenico; Párniczky Andrea; Frokjaer Jens Brondum; Buttgereit Frank; Capurso Gabriele; Culver Emma L.; De-Madaria Enrique; Della-Torre Emanuel; Detlefsen Sonke; Párniczky Andrea; Czakó László; Hegyi Péter; UEG guideline working group: European Guideline on IgG4-related digestive disease - UEG and SGF evidence-based recommendations. UNITED EUROPEAN GASTROENTEROLOGY JOURNAL, 8 (6). pp. 637-666. ISSN 2050-6406 (2020)