Retrospective Study
Copyright ©The Author(s) 2023.
World J Gastroenterol. Nov 28, 2023; 29(44): 5882-5893
Published online Nov 28, 2023. doi: 10.3748/wjg.v29.i44.5882
Figure 1
Figure 1 Flow chart of the study. OMOP-CDM: Observational Medical Outcomes Partnership-Common Data Model; AUMC: Ajou University Medical Center; DCMC: Daegu Catholic Medical Center; EUMC: Ewha Womans University Medical Center; GNUH: Gyeongsang National University Hospital; KDH: Kangdong Sacred Heart Hospital; KNUH: Kangwon National University Hospital; WKUH: Wonkwang University Hospital; PPI: Proton pump inhibitor; PUD: Peptic ulcer disease; H. pylori: Helicobacter pylori.