Novel HLA alleles associated with MCTD and disease subsets were identified and DRB1*04:01 was confirmed as a major risk allele. Altogether, the data reinforce the notion of MCTD as a disease entity distinct from lupus, scleroderma and polymyositis. PubMed, Rheumatology, 2014 Sep 3. (Also see: Mixed Connective Tissue Disease)
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