KIRAÇ, Suna, et al. “The Early Diagnosis of Hepatopulmonary Syndrome by 99mTc-MAA Scintigraphy in Chronic Liver Disease”. Turkish Journal of Gastroenterology, vol. 8, no. 4, Jan. 1997, pp. 385-91, https://turkjgastroenterol.org/index.php/tjg/article/view/825.