Gastro-intestinal blood loss with sustained release aspirin.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000188:drug therapy; D001241:Aspirin / Q000008:administration & dosage* / Q000009:adverse effects / Q000627:therapeutic use; D002860:Chromium Radioisotopes; D003692:Delayed-Action Preparations; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000139:chemically induced / Q000517:prevention & control*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000188:drug therapy; D013167:Spondylitis, Ankylosing / Q000188:drug therapy
D002860:Chromium Radioisotopes; D003692:Delayed-Action Preparations; D001241:Aspirin