S. Valadan Tahbaz, A. Yadegar, N. Amirmozafari, S. Yaghoobee, M. J. Ehsani-Ardekani, and H. Zojaji, “Occurrence of Helicobacter pylori and its major virulence genotypes in dental plaque samples of patients with chronic periodontitis in Iran”, Gastroenterol Hepatol Bed Bench, vol. 10, no. Supplement 1, pp. S70-S78, Dec. 2017.