Murali S, Uretsky BF, Armitage JM, Tokarczyk TR, Betschart AR, Kormos RL, Stein KL, Reddy PS, Hardesty RL, Griffith BP. Utility of prostaglandin E1 in the pretransplantation evaluation of heart failure patients with significant pulmonary hypertension. J Heart Lung Transplant. 1992 Jul-Aug; 11(4 Pt 1):716-23.