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Representative images of H&E, Masson’s trichrome, and PAS stained lung tissue obtained 30 days following instillation of MWCNTs in C57BL/6 mice without (upper panels) or with methylprednisolone treatment (lower panels). C57BL/6 mice were treated with methylprednisolone (1 mg/kg body weight) via i.p. injection 30 minutes prior to instillation of MWCNT and 7, 14, 21, and 28 days after exposure.
