Al-Naamani N, Krowka MJ, Forde KA, Krok KL, Feng R, Heresi GA, Dweik RA, Bartolome S, Bull TM, Roberts KE, Austin ED, Hemnes AR, Patel MJ, Oh JK, Lin G, Doyle MF, Denver N, Andrew R, MacLean MR, Fallon MB, Kawut SM. Estrogen Signaling and Portopulmonary Hypertension: The Pulmonary Vascular Complications of Liver Disease Study (PVCLD2). Hepatology. 2021 02; 73(2):726-737.