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. Author manuscript; available in PMC: 2019 Dec 30.
Published in final edited form as: Environ Int. 2015 Dec 14;88:30–35. doi: 10.1016/j.envint.2015.11.019

Fig. 1.

Fig. 1.

Urinary concentration versus age (years) for 1-NAP (A, ng/L) and 1-PYR (B, ng/L). Triangles denote female pools, squares denote male pools. Horizontal line indicates mean concentration of four pools in each age strata. Note log axis for 1-NAP.