Cytokines, cytokine gene polymorphisms and Helicobacter pylori infection: Friend or foe?

Figure 2 Diagram of the polymorphisms evaluated for risk of Helicobacter pylori infection. The black boxes contain the cytokines that were studied. In the green boxes on the left are the references of works that identified associations between polymorphisms and Helicobacter pylori (H. pylori) infection, and the red boxes on the right contain the references of publications that identified no associations of polymorphisms with H. pylori infection.