Steffanus, Mario, et al. “Positive Correlation Between Degree of Liver Cirrhosis and N Terminal–Pro Brain Natriuretic Peptide (NT-Pro-BNP)”. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy, vol. 16, no. 2, Aug. 2015, pp. 73-77, doi:10.24871/162201573-77.