| Literature DB >> 3134089 |
N C Hill1, J G Hill, J M Sargent, C G Taylor, P V Bush.
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Year: 1988 PMID: 3134089 PMCID: PMC2546022 DOI: 10.1136/bmj.296.6635.1505-a
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623