| Literature DB >> 21614631 |
Douglas L Nguyen1, Christopher M Wittich.
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Year: 2011 PMID: 21614631 PMCID: PMC3208471 DOI: 10.1007/s11606-011-1742-5
Source DB: PubMed Journal: J Gen Intern Med ISSN: 0884-8734 Impact factor: 5.128