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Macroscopic morphology of the gastric mucosa following alcohol or cold stress treatments. The gross morphology of gastric mucosa was observed in gastric ulcer (GU) mice challenged with alcohol (A-D) or cold stress (E-H). In alcohol or cold stress-induced GU model, 40 mice were evenly divided into Sham control group (A, E), Model group (without pretreatment) (B, F), Clostridium butyricum (C. butyricum) pretreatment group (C, G) and omeprazole pretreatment group (D, H), respectively.
