Fig. 5From: The role of matrix metalloproteinases in patients with pulmonary hypertension: data from a prospective studyCorrelation between disease severity and NT-proBNP concentration. We have box plots showing biomarker levels in different patient subpopulations. Patients were grouped based on disease severity determined by a WHO classification, b systolic arterial pressure (sPAP), and c the severity of TV regurgitationBack to article page