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DNA migration (mm) in the kidney tissues assessed by Comet assay in mice at the end of the 1-week and 4-week exposure periods to air (control) or water-pipe smoke (WPS). Images illustrating the quantification of the DNA migration by the Comet assay under alkaline conditions in mice at the end of the 1-week and 4-week exposure periods to air or WPS. Data are mean ± SEM (n = 5).
