TAŞKIN, Vildan, and Fatih HİLMİOĞLU. “Therapeutic Endoscopic Retrograde cholangiopancreatography:Factors Influencing Complication Risk”. Turkish Journal of Gastroenterology, vol. 10, no. 4, Jan. 1999, pp. 353-6, https://turkjgastroenterol.org/index.php/tjg/article/view/1015.