Burhan Hakan Kanat, et al. “Significance of Appetite Hormone Ghrelin and Obestatin Levels in the Assessment of the Severity of Acute Pancreatitis”. Turkish Journal of Gastroenterology, vol. 25, no. 3, July 2019, pp. 309-13, https://tjg.avesjournals.com/index.php/tjg/article/view/2960.