has received travel support from Janssen. Andrea Kreienbuehl received travel support from Falk and Gilead. Thomas Greuter has served as a consultant for Sanofi; received a travel grant from Falk Pharma and Vifor, and received unrestricted research grant support from Novartis. Simon Nennstiel received compensation for travel expenses by the Falk Foundation e.V. and Adare Pharmaceuticals, Inc.. Ekaterina Safroneeva has received consulting fees from Avir Pharma, Aptalis Pharma, Celgene, Novartis AG, and Regeneron Pharmaceuticals. Cathrine Saner has nothing to declaire. Valeria Schindler has nothing to declare. Christoph Schlag is a member of the advisory board of Adare Pharmaceuticals, EsoCap and Calypso and received speaker fees, travel and research funding