| Literature DB >> 6435796 |
S J Proctor, S L Chawla, A G Bird, J Stephenson.
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Year: 1984 PMID: 6435796 PMCID: PMC1443290 DOI: 10.1136/bmj.289.6452.1112
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623