Fig. 3From: Biological and behavioral factors modify urinary arsenic metabolic profiles in a U.S. populationRelation between concentrations of total arsenic in nails and concentrations of inorganic arsenic and its methylated metabolites in urine, a iAs, b MMA, and c DMA. Arsenic concentrations expressed as parts per million (ppm, μg per g) in nails and as parts per billion (ppb, μg per l) in urineBack to article page