“…the decrease of MT1 and the increase of MT3 found in our patients may be in agreement with the reduction of DR2 and the increase of DR7 reported in previous studies (see references in Kirsner & Shorter 1982). There is indeed a strong association between MT and MB antigens, and DR antigens (Park et al 1980, Duquesnoy & Marrari 1980 Frequencies of HLA-DR, M T and M B antigens in 28 patients with Crohn's disease and 132 controls') Petit et al 1982, Miyanaga et al 1981, Volkman et al 1982. In our patients the gene for susceptibility to Crohn's disease appears to be associated with the MT3 gene, whereas the gene for resistance appears to be associated with the MT1 (MB1) gene.…”