Erkan Parlak, et al. “Unusual Cholangiographic Findings in a Patient With Primary Sclerosing Cholangitis: Cystic Dilatation”. Turkish Journal of Gastroenterology, vol. 23, no. 6, July 2019, pp. 792-4, https://tjg.avesjournals.com/index.php/tjg/article/view/2746.