Environ Health Perspect 121:A113 (2013). http://dx.doi.org/10.1289/ehp.121-a113b [online 01 April 2013]
In a typographical error, the March 2013 News article “New Primary Standard Set for Fine Particulate Matter Pollution” (Environ Health Perspect 121:A74; doi: 10.1289/ehp.121-a74) incorrectly expressed the 24-hour primary standard and annual and 24-hour secondary standards for PM2.5 in milligrams per cubic meter. The standards should have been expressed as micrograms per cubic meter.
EHP regrets the error.