| Literature DB >> 17329636 |
Susan J Klein, Daniel A O'Connell, Alma R Candelas, James G Giglio, Guthrie S Birkhead.
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Year: 2007 PMID: 17329636 PMCID: PMC1829334 DOI: 10.2105/AJPH.2006.106120
Source DB: PubMed Journal: Am J Public Health ISSN: 0090-0036 Impact factor: 9.308