Correction to: Journal of Exposure Science and Environmental Epidemiology (2012) 22, 299–303; doi:https://doi.org/10.1038/jes.2012.2; published online 15 February 2012

In this article, Figure 1 legend has an error; a revised legend is provided.

Figure 1. Approximate bias in log concentration regression half-life estimates in the presence of background exposures. Contours show the bias as a fraction of the true half-life, depending on the ratio of background to initial biomarker concentration (f) and the number of elapsed half-lives between the two time points (m).