AKARSU, Ersin, et al. “Serum Nitric Oxide in Liver Cirrhosis and Its Relation to Blood Pressure”. Turkish Journal of Gastroenterology, vol. 10, no. 4, July 2019, pp. 315-8, https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/974.