| Literature DB >> 5559437 |
R P McCaffrey, C H Halsted, M F Wahab, R P Robertson.
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Year: 1971 PMID: 5559437 DOI: 10.7326/0003-4819-74-5-722
Source DB: PubMed Journal: Ann Intern Med ISSN: 0003-4819 Impact factor: 25.391