| Literature DB >> 19150894 |
Helen L Walls, Anna Peeters, Bebe Loff, Bradley R Crammond.
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Year: 2009 PMID: 19150894 PMCID: PMC2661472 DOI: 10.2105/AJPH.2008.156232
Source DB: PubMed Journal: Am J Public Health ISSN: 0090-0036 Impact factor: 9.308