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. 2007 Nov 12;116(2):256–262. doi: 10.1289/ehp.10440

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Associations between four amalgam exposure measures and cumulative U-Hg excretion (creatinine-corrected): current number of surfaces (A) and posterior occlusal surfaces (B), and amalgam (C) and posterior occlusal (D) surface-years. The regression lines are based on log-transformed cumulative U-Hg.