title: Inaccurate endoscopy: a better explanation for placebo-associated endoscopic ulcers.
authors.forename: D Y
authors.initials: DY
authors.lastname: Graham
authors.forename: F K L
authors.initials: FK
authors.lastname: Chan
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects*; D003951:Diagnostic Errors; D004381:Duodenal Ulcer / Q000139:chemically induced*; D016145:Endoscopy, Digestive System / Q000592:standards*; D006801:Humans; D015201:Meta-Analysis as Topic; D015990:Placebo Effect; D016032:Randomized Controlled Trials as Topic; D013276:Stomach Ulcer / Q000139:chemically induced*
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal