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(a) Formation of Mesothelioma in the lung of rasH2 mice intravenously administered with MWCNTs. The right is an enlarged image of the square in the left image; (b) histological image of the pancreas in rasH2 mice administered intravenously with MWCNTs. Particles of MWCNTs are deposited in the tissue. There is no tumor formation. The right is an enlarged image of the square in the left image. Images are modified from a study by Sobajima et al. [59].
