| Literature DB >> 6052855 |
R D Ruppert, N J Greenberger, F M Beman, F M McCullough.
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Year: 1967 PMID: 6052855 DOI: 10.7326/0003-4819-67-4-808
Source DB: PubMed Journal: Ann Intern Med ISSN: 0003-4819 Impact factor: 25.391