Fig. 2From: Past mercury exposure and current symptoms of nervous system dysfunction in adults of a First Nation community (Canada)Distribution of Hg biomarker concentrations over time. a Umbilical cord blood Hg (μg/L) collected between 1970 and 1992 (n = 211). b Equivalent hair Hg (μg/g) from samples collected between 1970 and 1997 (n = 657)Back to article page