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ROC curves for performance of models in severe PH (mPAP ≥ 35 mmHg OR mPAP >25 and CI < 2l/min/m2). ROC: receiver operating characteristic curve; AUC: area under the ROC curve; mPAP: mean pulmonary artery pressure; CI: cardiac index; CLD: chronic lung disease; PH: pulmonary hypertension; MRI: magnetic resonance imaging.
