Mean plasma PTX3 concentrations in the CTD-PAH and CTD patients were 5.02±0.69 ng/mL (range 1.82–12.94 ng/mL) and 2.40±0.14 ng/mL (range 0.70–4.29 ng/mL), respectively (Table 2). The gene discussed is PTX3; the disease is pulmonary arterial hypertension.