| Literature DB >> 6778552 |
R H Williams, R A Wood, M C Mason, M Edwards, P Goodall.
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Year: 1981 PMID: 6778552 PMCID: PMC1503754 DOI: 10.1136/bmj.282.6257.21
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623