His Scientific work contributed to more than 330 papers in international journals (H-Index 2021=72). He has been General Secretary of the Belgian Society of Gastroenterology 2005-2009, President of the Belgian IBD Research group (2008-2011), member of the Scientific Committee of the ECCO (European Crohn and Colitis Organisation) (2010-2013) and Chair of this Scientific Committee (2013-2015). He has been member of the board of the GETAID (groupe d’étude thérapeutique des affections inflammatoires digestives) (2004-ongoing), president of the GETAID (2012-2015), Associate Editor of Journal of Crohn’s and Colitis (2018-ongoing).