1. IARC monographs on the evaluation of carcinogenic risks to humans. Volume 61 Schistosomes, liver flukes and Helicobacter pylori. Lyon: International Agency for Research on Cancer, World Health Organization; 1994, p. 1–241.
2. Czesnikiewicz-Guzik M, Bielanski W, Guzik TJ, Loster B, Konturek SJ. Helicobacter pylori in the oral cavity and its implications for gastric infection, periodontal health, immunology and dyspepsia. J Physiol Pharmacol. 2005;56:77–89.
3. Goodwin CS, Mendall MM, Northfield TC. Helicobacter pylori infection. Lancet. 1997;349:265–9.
4. Zou QH, Li RQ. Helicobacter pylori in the oral cavity and gastric mucosa: a meta-analysis. J Oral Pathol Med. 2011;40:317–24.
5. Salazar CR, Francois F, Li Y, Corby P, Hays R, Leung C, Bedi S, Segers S, Queiroz E, Sun J, Wang B, Ho H, Craig R, Cruz GD, Blaser MJ, Perez-Perez G, Hayes RB, Dasanayake A, Pei Z, Chen Y. Association between oral health and gastric precancerous lesions. Carcinogenesis. 2012;33:399–403.