| Literature DB >> 6788133 |
B Pentland, C N Martyn, C R Steer, J E Christie.
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Year: 1981 PMID: 6788133 PMCID: PMC1505303 DOI: 10.1136/bmj.282.6271.1197
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623