Adapted from: Nieuwenburg SA, Waddingham WW, Graham D. Accuracy of endoscopic staging and targeted biopsies for routine gastric intestinal metaplasia and gastric atrophy evaluation study protocol of a prospective, cohort study: the estimate study. BMJ Open 2019; 9:e032013. Copyright © 2019 The Authors. Available at:
https://bmjopen.bmj.com/content/9/9/e032013 (Accessed on February 18, 2020). Reproduced under the terms of the
Creative Commons Attribution License.