Retraction
The authors have retracted this article [1] because of an error with the data extraction process. A re-examination of the dataset suggests that the authors did not include all smokefree policies for indoor spaces. Due to the error with the data extraction process, the conclusions drawn in the article regarding smokefree policies for indoor spaces are incorrect. All authors agree to this retraction. A revised version of the article has now been published [2].
References
Lowrie C, Pearson AL, Thomson G. Inequities in coverage of smokefree space policies within the United States. BMC Public Health. 2017;17:456.
Lowrie C, Pearson AL, Thomson G. Inequities in coverage of smokefree space policies within the United States: school grounds and playgrounds. BMC Public Health. 2018;18:736.
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Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
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Lowrie, C., Pearson, A.L. & Thomson, G. Retraction Note: Inequities in coverage of smokefree space policies within the United States. BMC Public Health 18, 799 (2018). https://doi.org/10.1186/s12889-018-5716-y
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DOI: https://doi.org/10.1186/s12889-018-5716-y