| Literature DB >> 6430415 |
J A Critchley, A T Proudfoot, S G Boyd, I W Campbell, N S Brown, A Gordon.
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Year: 1984 PMID: 6430415 PMCID: PMC1442293 DOI: 10.1136/bmj.289.6439.225
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623