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. Author manuscript; available in PMC: 2018 Apr 11.
Published in final edited form as: J Toxicol Environ Health B Crit Rev. 2010 Oct;13(7-8):509–526. doi: 10.1080/10937404.2010.509013

FIGURE 6.

FIGURE 6

The cII mutant frequencies in the livers of rats treated with comfrey roots. Male Big Blue transgenic rats were fed a diet containing comfrey roots at different percentages (2, 4, and 8%) for 3 mo. Data represent means ± SD from six rats in each group. The comfrey-induced mutant frequencies were significantly higher than for controls (p < .05).