| Literature DB >> 18279682 |
James Trussell1, Katherine A Guthrie, Eleanor Bimla Schwarz.
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Year: 2008 PMID: 18279682 DOI: 10.1016/j.contraception.2007.11.012
Source DB: PubMed Journal: Contraception ISSN: 0010-7824 Impact factor: 3.375