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Representative light micrographs of lung tissue from rats after intratracheal administration of 6 mg/kg of the indicated form of TiO2. At three days after intratracheal administration: (A) Control, (B) MT-150AW, (C) TTO-S-3, (D) TTO-S-3 (Coated), (E) MP-100. At four weeks after intratracheal administration: (F) Control, (G) MT-150AW, (H) TTO-S-3, (I) TTO-S-3 (Coated), (J) MP-100.
