| Literature DB >> 6423084 |
M F Murphy, R M Minchinton, P Metcalfe, P Grint, A H Waters.
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Year: 1984 PMID: 6423084 PMCID: PMC1444666 DOI: 10.1136/bmj.288.6419.795
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623