Erratum, Vol. 9, May 31 Release
Suggested citation for this article: Erratum, Vol. 9, May 31 Release. Prev Chronic Dis 2012;9:110277e. DOI: http://dx.doi.org/10.5888/pcd9.110277e.Because of an editing error, we omitted a symbol used for statistical calculations in the article “Economic Effect of Smoke-Free Ordinances on 11 Missouri Cities.” The sentence should have read, “The percentage change between preordinance and postordinance was estimated by exp () – 1.” This correction was made to our website on June 27, 2012, and appears online at http://www.cdc.gov/pcd/issues/2012/11_0277.htm. We regret any confusion or inconvenience this error may have caused.