title: Timing of endoscopy in high-risk patients with nonvariceal upper           gastrointestinal bleeding.
authors: G D
authors: GD
authors: Corbett
authors: E A
authors: EA
authors: Cameron
mesh_terms: D016099:Endoscopy, Gastrointestinal; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000401:mortality*; D016558:Hemostasis, Endoscopic; D017052:Hospital Mortality; D006801:Humans; D008297:Male