Rana KARAYALÇIN, et al. “Prevalence of Cholelithiasis in a Turkish Population Sample of Postmenopausal Women”. Turkish Journal of Gastroenterology, vol. 21, no. 4, July 2019, pp. 416-20, https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/2367.