title: A method of evaluation of the influence of aspirin formulations on gastrointestinal microbleeding in humans.
mesh_terms: D000328:Adult; D001241:Aspirin / Q000009:adverse effects*; D002859:Chromium Isotopes; D002986:Clinical Trials as Topic; D004339:Drug Compounding; D005069:Evaluation Studies as Topic; D005243:Feces / Q000032:analysis; D006471:Gastrointestinal Hemorrhage / Q000139:chemically induced*; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D009780:Occult Blood
chemical_list: D002859:Chromium Isotopes; D001241:Aspirin