Am J Public Health. 2009 Nov;99(11):1930-2. doi: 10.2105/AJPH.2009.167908. Epub 2009 Sep 17.
American journal of public health
Garth N Graham, Robert F Spengler
PMID: 19762653 PMCID: PMC2759809 DOI: 10.2105/AJPH.2009.167908
[No abstract available.]