ÜNSAL, Belkıs, Kadir AKSÖZ, F. ERCİYES, and Sadun KOŞAY. 1995. “Assessment of Helicobacter Pylori Infection With Serological Testing Which Is a Fast and Non-Invasive Method”. Turkish Journal of Gastroenterology 6 (1):117-18. https://turkjgastroenterol.org/index.php/tjg/article/view/585.