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Photomicrographs of representative histological sections of the lung (400x magnification). (a) Control group: no treatment; (b) LPS group: endotoxemia rat model induced by LPS. (c) Posttreatment group: endotoxemia rat model treated with 5′-AMP. (d) Pretreatment group: rats pretreated with 5′-AMP prior to LPS treatment.
