Firth AL, Yao W, Remillard CV, Ogawa A, Yuan JX-. Upregulation of Oct-4 isoforms in pulmonary artery smooth muscle cells from patients with pulmonary arterial hypertension. American Journal of Physiology-Lung Cellular and Molecular Physiology. 2010 Apr;298(4):L548–57. doi: 10.1152/ajplung.00314.2009.