| Literature DB >> 6174172 |
N E Parker, J B Porter, H J Williams, N Leftley.
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Year: 1982 PMID: 6174172 PMCID: PMC1496008 DOI: 10.1136/bmj.284.6313.385-a
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623