Wasan Abdul-elah Bakir, et al. “The Impact of Helicobacter Pylori on Lesion Type and Matrix Metalloproteinase-9 Expression in Laryngeal Tumors”. Diyala Journal of Medicine, vol. 28, no. 1, Apr. 2025, pp. 104-18, doi:10.26505/djm.v28i1.1250.