When to stop chemical tests.
D004932:Esophageal and Gastric Varices / Q000628:therapy*; D006471:Gastrointestinal Hemorrhage / Q000628:therapy; D006489:Hemostatic Techniques / Q000295:instrumentation; D006801:Humans; D007440:Intubation / Q000295:instrumentation*; D013223:Statistics as Topic