Hasan YAVUZ, et al. “Per-Oral Scintigraphic Evaluation of Upper Portosystemic Shunts in Portal Hypertension”. Turkish Journal of Gastroenterology, vol. 10, no. 4, July 2019, pp. 340-4, https://tjg.avesjournals.com/index.php/tjg/article/view/1605.