Monthly variations in drug-induced gastric ulcers in rats.
D000818:Animals; D001241:Aspirin; D002980:Climate; D005260:Female; D010437:Peptic Ulcer / Q000139:chemically induced* / Q000473:pathology; D010507:Periodicity; D010653:Phenylbutazone; D051381:Rats; D012110:Reserpine; D012621:Seasons
D012110:Reserpine; D010653:Phenylbutazone; D001241:Aspirin