SNRPB and systemic lupus erythematosus: When correlating autoantibody specificities with race, there was a statistically significant association of autoantibodies to U1-68 kDa (P = 0.002), U1-A (P < 0.0001), U1-C (P = 0.0002), SmBB' (P = 0.0004), dsDNA (P = 0.0128) and SmD (P = 0.0002) with black race among SLE patients.