NLRP2 and inflammatory bowel disease: The lack of an association of this variant with IBD in the Jewish population could reflect the fact that NLRP7 variants are challenging to genotype because of homology with the nearby gene NLRP2, or that environmental components such as commensal bacteria and other factors that act through the NLRP7 pathway are also likely to play a substantial role in the aetiology of IBD in this population.