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The histopathology of the lungs in male rats exposed to the mixture of SM and PG by aerosol inhalation for 2 weeks. The results of (A–E) are the results for the control, vehicle control, low, medium, and high groups, respectively. No pathological findings resulted from the exposure of the test materials. a, alveoli; b, bronchioles. H&E staining. Magnification = ×200 for all images.
