Doğukan Özbey, et al. “The Relationship Between Gastroduodenal Pathologies and Helicobacter Pylori CagL (Cytotoxin-Associated Gene L) Polymorphism”. Turkish Journal of Gastroenterology, vol. 34, no. 4, Apr. 2023, pp. 346-55, https://tjg.avesjournals.com/index.php/tjg/article/view/4566.