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Flowchart of patient selection process.
Notes: aSex, age, history of serious GI complications, history of non-serious GI complications, cirrhosis, hemorrhagic stroke and the Charlson Comorbidity Index score were used as matching variables.
Abbreviations: GI, gastrointestinal; GPA, gastroprotective agent; H2RA, histamine-2 receptor antagonist; PPI, proton-pump inhibitor; tNSAID, traditional non-steroidal anti-inflammatory drugs.
