| Literature DB >> 3103734 |
N D Munro, N J Wild, S Sheppard, R W Smithells, M H Hambling.
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Year: 1987 PMID: 3103734 PMCID: PMC1245523 DOI: 10.1136/bmj.294.6570.481
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623