| Literature DB >> 2502060 |
A S Yap, E E Powell, C E Yelland, R H Mortimer, D A Perry-Keene.
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Year: 1989 PMID: 2502060 DOI: 10.7326/0003-4819-111-3-262
Source DB: PubMed Journal: Ann Intern Med ISSN: 0003-4819 Impact factor: 25.391