Yüksel GÜMÜRDÜLÜ (2019) “Predictors of vitamin B-12 deficiency: Age and helicobacter pylori load of antral mucosa”, Turkish Journal of Gastroenterology, 14(1), pp. 44–49. Available at: https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/1827 (Accessed: 18 July 2025).