| Literature DB >> 2514864 |
S Levi1, K Beardshall, I Swift, W Foulkes, R Playford, P Ghosh, J Calam.
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Year: 1989 PMID: 2514864 PMCID: PMC1838341 DOI: 10.1136/bmj.299.6714.1504
Source DB: PubMed Journal: BMJ ISSN: 0959-8138