title: Gastrointestinal blood loss during prolonged aspirin administration.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D001241:Aspirin / Q000008:administration & dosage* / Q000009:adverse effects; D002860:Chromium Radioisotopes; D004361:Drug Tolerance; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000139:chemically induced*; D006801:Humans; D008297:Male; D009780:Occult Blood; D012459:Salicylates / Q000097:blood; D013997:Time Factors
chemical_list: D002860:Chromium Radioisotopes; D012459:Salicylates; D001241:Aspirin