| Literature DB >> 3931744 |
R A Coward, C P Gibbons, C B Brown, A T Raftery, M A Parsons, J R Shortland.
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Year: 1985 PMID: 3931744 PMCID: PMC1416747 DOI: 10.1136/bmj.291.6499.865
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623