| Literature DB >> 4868553 |
W A Cramond, P R Knight, J R Lawrence, B A Higgins, J H Court, F M MacNamara, A R Clarkson, C D Miller.
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Year: 1968 PMID: 4868553 PMCID: PMC1985257 DOI: 10.1136/bmj.1.5591.539
Source DB: PubMed Journal: Br Med J ISSN: 0007-1447