Complex sentence: In "allergic" disease A1, B8 were found to associate with allergic reactions in new-borns however some of this reaction can be attributed to the linkage of the HLA A1-B8-DR3-DQ2 haplotype to the IgA-less phenotype.
Split into simpler sentences: In "allergic" disease A1, B8 were found to associate with allergic reactions in new-borns. However, some of this reaction can be attributed to the linkage of the HLA A1-B8-DR3-DQ2 haplotype to the IgA-less phenotype.