| Literature DB >> 5809682 |
J C Gunnells, W L McGuffin, I Johnsrude, R R Robinson.
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Year: 1969 PMID: 5809682 DOI: 10.7326/0003-4819-71-3-555
Source DB: PubMed Journal: Ann Intern Med ISSN: 0003-4819 Impact factor: 25.391