BMPR2 and idiopathic pulmonary arterial hypertension: The main dataset was obtained as Affymetrix array-based gene expression data from anticoagulated whole blood samples collected from 86 patients, which includes the healthy control group (22 patients), the IPAH group (20 patients, BMPR2 mutation excluded), the HPAH (17 patients) and the BMPR2 mutation carriers that have no clinical signs of disease (27 Unaffected Mutation Carriers, UMC).