ITLN1 has been identified as a potential genetic risk element for inflammatory bowel disease (IBD; Jostins et al., 2012; Ellinghaus et al., 2016; Huang et al., 2017; Liu et al., 2015); however, the relative contribution of ITLN1 versus other genes in linkage disequilibrium to this genetic risk locus remains unclear (Nonnecke et al., 2021). This evidence concerns the gene ITLN1 and inflammatory bowel disease.