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Correlation of endostatin levels with clinical parameters of IPAH patients. Significant positive correlation of endostatin level and pulmonary arterial wedge pressure (PAWP; A), right atrial pressure (RAP; B), NH2-terminal pro-brain natriuretic peptide (NT-proBNP; E), and uric acid (F) and negative correlation with cardiac index (CI; C) and 6-min walking distance (6MWD; D). R, Spearman R; P, significance level.
