| Literature DB >> 3115426 |
H M Smith1, G J Alexander, W Birnbaum, R Williams.
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Year: 1987 PMID: 3115426 PMCID: PMC1247149 DOI: 10.1136/bmj.295.6593.309
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623