NOD2 and Crohn disease: 29 Büning Büning C C Genschel Genschel J J Bühner Bühner S S Krüger Krüger S S Kling Kling K K Dignass Dignass A A Baier Baier P P Bochow Bochow B B Ockenga Ockenga J J Schmidt Schmidt HH HH Lochs Lochs H H Mutations in the NOD2/CARD15 gene in Crohn's disease are associated with ileocecal resection and are a risk factor for reoperation Mutations in the NOD2/CARD15 gene in Crohn's disease are associated with ileocecal resection and are a risk factor for reoperation Aliment Pharmacol Ther.