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Tumorigenicity of arsenic-exposed TRL 1215 cells in nude mice. TRL 1215 cells treated with 0, 0.125, 0.250, and 0.500 μM arsenic for 18 weeks were inoculated subcutaneously into Nude mice (n = 13–15). (A) Tumor incidence data as a percentage of the number of mice inoculated. (B) Rate of metastasis as a percentage of total tumors.
