Fabian, O., M. Cazacu, I. Şimon, and E. Pătruţ. “Risk of Delayed Diagnosis of Colorectal Cancer in Patients With Gallstone Disease”. Medicine and Pharmacy Reports, Vol. 85, no. 4, Feb. 2014, pp. 614-9, https://medpharmareports.com/index.php/mpr/article/view/148.