ACLY and systemic lupus erythematosus: In a Chinese population (n = 84 patients with PAH-SLE), Raynaud’s phenomenon, digital vasculitis, pericardial effusion, interstitial lung changes, positive anti-U1-RNP antibodies, and positive aCL (immunoglobulin G class) were associated with a significantly higher risk of PAH-SLE [12].