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the 1975 Declaration of Helsinki and was approved by the institutional ethics committee. Informed consent was obtained from each study participant. Results and discussion We enrolled 50 patients with PAH (n = 31; 62% women) at the median (IQR) age of 57 ( 45.5-71) years, with idiopathic PAH (n = 40 [80%]) and PAH associated with connective tissue disease (n = 10 [20%]). At the time of enrollment, most patients (n = 45 [90%]) had been previously diagnosed and 5 (10%) patients were newlydoi:10.33963/kp.15344 pmid:32395970 fatcat:cegaryb4cbbcrjqciyfw3ngg3i