Fig 1: Receiver operating characteristic (ROC) curves for CA2 (a), KLKB1 (b), comparison of ROC (c) for IGFBP1, IGFBP2, IGFBP4, IGFBP5, and IGFBP7 as predictors of pulmonary arterial hypertension for 36 subjects from the PAH cohort and 35 healthy control subjects. AUC, area under the curve