The primary outcome measure will be yield of NBI, high definition white light endoscopy, and random biopsy for the detection of atrophic gastritis, IM and dysplasia on a per patient basis. A secondary endpoint will be the number of regions found by each method to exhibit atrophic gastritis, IM, and dysplasia (per lesion (region) yield). The yields of H. Pylori by method and the total number of biopsies guided per method will be additional outcomes.