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(A) Histopathology images of lung tissue sections from a representative control mouse and mouse exposed to SWCNT for 0 (A,E) 3 (B.F), 7 (C,G), and 21 (D,H) days. Lung tissues sections were stained with H&E and images captured using light microscopy. Increased magnification of lung tissue sections are shown in E-H (scale bar 20 μm of the images above, A-D (scale bar 40 μm). Pictures represent consistent observations from N=4 mice per treatment group.
