BCL2L1 and chronic atrophic gastritis: In the present study, we investigated TRAF1, 4-1BB, and Bcl-xL expression in gastric mucosa derived from H. pylori–infected patients with chronic nonatrophic gastritis (CG), atrophic gastritis (AG), intestinal metaplasia with atypical hyperplasia (IM), and gastric carcinoma (Ca).