Serum BNP, PTX3, and VEGF levels in subjects from the Non‐PAH and PAH groups were compared and the results disclosed that higher serum levels of BNP, PTX3, and VEGF were observed in the PAH group versus the Non‐PAH group (all p < .05) (Table 4). The gene discussed is PTX3; the disease is pulmonary arterial hypertension.