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Representative electron micrographs of the glomerular structures of the kidney of mice at the end of 1-week exposure period to air (control, A), 1-week exposure period water pipe smoke (WPS) exposure (B), 4-week exposure period to air (control, C) or 4-week exposure period to WPS (D). Degenerating endothelial cells (black arrow shown in micrograph D) was discerned in the kidney of mice exposed to WPS at 4-week exposure period. Scale bar = 2 μm; n = 10.
