Statistical significance of differences in 204Pb/206Pb for test substance, diet, blood, urine, and feces in different dose groups (n = 6) of respiratory lead exposure.

Note: Difference are significant when pa, bA significant difference with blood and urine, respectively.c, d, eA significant difference with control group, low dose group and medium dose group, respectively.f, gA significant difference with test substance and diet, respectively.