Oterdoom, L. H., van Weyenberg, S. J., & de Boer, N. K. (2013). Double-duct Sign: Do Not Forget the Gallstones. Journal of Gastrointestinal and Liver Diseases, 22(4), 447–450. Retrieved from https://www.jgld.ro/jgld/index.php/jgld/article/view/2013.4.14