Sarari, Abdel Salam, Mohammad A. Farraj, Wael Hamoudi, and Tamer A. Essawi. “Helicobacter Pylori, a Causative Agent of Vitamin B12 Deficiency”. The Journal of Infection in Developing Countries 2, no. 05 (October 1, 2008): 346–349. Accessed November 28, 2024. https://jidc.org/index.php/journal/article/view/19745500.