- Chronic endothelin A receptor blockade in lambs with increased pulmonary blood flow and pressure. Fratz, S., Meyrick, B., Ovadia, B., Johengen, M.J., Reinhartz, O., Azakie, A., Ross, G., Fitzgerald, R., Oishi, P., Hess, J., Black, S.M., Fineman, J.R. Am. J. Physiol. Lung Cell Mol. Physiol. (2004)