| Literature DB >> 6799045 |
S A Richardson, D S Brookfield, T A French, J Gray.
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Year: 1981 PMID: 6799045 PMCID: PMC1507881 DOI: 10.1136/bmj.283.6305.1510
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623