FGA and chronic thromboembolic pulmonary hypertension: Chen et al., in a study on 190 patients with CTEPH and a control group of patients without CTEPH, confirmed the previously proven association of the development of the disease with the polymorphism of the fibrinogen alpha gene (FGA) and demonstrated the direct role of miR-759 in the regulation of FGA expression through interactions with the polymorphic site (deletion/insertion (Del/Ins)) polymorphism of 28 base pairs (bp) in the 3′-UTRs of mRNAs [67].