| Literature DB >> 3921143 |
M J Raftery, P Forman, K Farrington, P Sweny, J F Moorhead.
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Year: 1985 PMID: 3921143 PMCID: PMC1418881 DOI: 10.1136/bmj.290.6476.1178
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623