HLA-C and systemic lupus erythematosus: Analyzed intervals showed no significant enrichment: O/E for RA without MHC = 1.29-fold, p = 0.3443; O/E for RA with MHC = 1.232-fold, p = 0.3426; O/E for SLE without MHC = 3.329-fold, p = 0.3849; O/E for SLE with MHC = 3.195-fold, p = 0.3776.