Correction to: Environ Health 12, 20 (2013)

https://doi.org/10.1186/1476-069X-12-20

Following publication of the original article [1], the authors reported an error in the unit of the average emission metric (AEI). The AEI was incorrectly reported as nanograms (ng) toxic equivalency quotient (TEQ)/year in the abstract, methods, discussion, and Table 1. The correct unit is grams (g) TEQ/year. The authors apologize for this error.