title: The activity-stress ulcer and antibody production in rats.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D002940:Circadian Rhythm; D004912:Erythrocytes / Q000276:immunology; D008027:Light; D008297:Male; D009043:Motor Activity / Q000502:physiology; D009929:Organ Size; D051381:Rats; D011919:Rats, Inbred Strains; D012756:Sheep / Q000276:immunology; D013276:Stomach Ulcer / Q000276:immunology* / Q000473:pathology; D013312:Stress, Physiological / Q000276:immunology*; D013997:Time Factors