| Literature DB >> 6409254 |
C C Patterson, M Thorogood, J I Mann, P G Smith, M A Heasman, J A Clarke.
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Year: 1983 PMID: 6409254 PMCID: PMC1548616 DOI: 10.1136/bmj.287.6386.213-c
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623