Production of gastric ulcers in the unrestrained rat.
D000818:Animals; D003220:Conflict, Psychological; D004195:Disease Models, Animal; D004597:Electroshock; D005260:Female; D006799:Housing, Animal; D006801:Humans; D008124:Locomotion; D051381:Rats; D013276:Stomach Ulcer; D013315:Stress, Psychological; D013997:Time Factors