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. 2014 Feb 25;9(2):e89805. doi: 10.1371/journal.pone.0089805

Table 1. Four lead isotope abundances (mean ± SD) for diet and test substance.

Lead source	²⁰⁴Pb%	²⁰⁶Pb%	²⁰⁷Pb%	²⁰⁸Pb%
Diet	1.364±0.007^a	24.952±0.052	21.249±0.044^a	52.438±0.045^a
Test substance	1.373±0.001	24.902±0.027	21.396±0.026	52.335±0.047

^a

significant difference between diet and test substance at P<0.05.