Anti-SSB (OR 4.095, 95% CI, 2.183–7.681) and anti-U1RNP antibodies (OR 29.518, 95% CI, 6.026–144.600) were identified as independent risk factors for PAH, whereas anti-SSA antibodies and hypergammaglobulinemia were not [108]. Here, SSB is linked to pulmonary arterial hypertension.