Safikhani mahmoodzadeh,A , , Moazamian,E , , Shamsdin,S A , and Kaydani,G A . "Investigating the level of anti-Helicobacter pylori antibodies in infected and non-infected patients with this bacterium", Medical Journal of Mashhad university of Medical Sciences, 66, 1, 2023, 74-82. doi: 10.22038/mjms.2022.66902.3961