. . . . . . . . . . . . "[The nature of the primary defect responsible for triggering and maintaining pulmonary artery smooth muscle (PA-SMC) proliferation in pulmonary artery hypertension (PH) is poorly understood but may be either an inherent characteristic of PA-SMCs or a secondary response to an external abnormality, such as up-regulation of growth factors.]. Sentence from MEDLINE/PubMed, a database of the U.S. National Library of Medicine."@en . . . . . "2014-02-25"^^ . . "Gene-disease associations inferred from text-mining the literature."@en . "DisGeNET evidence - LITERATURE"@en . "2014-10-02T12:40:43+02:00"^^ . . . . . . . . . . . "v2.1.0.0" . "v2.1.0" .