RNPC3 and systemic lupus erythematosus: Finally, Wang et al., in a recently published meta-analysis, identified the anti-RNP antibody and anti-Sm antibody as risk factors for SLE-associated pulmonary arterial hypertension with pooled ORs of 3.68 (95% CI 2.04–6.63, P <0.0001) and 1.71 (95% CI 1.06–2.76, P = 0.03), respectively [34].