| Literature DB >> 3931780 |
J M Wales, A R Buchan, J B Cookson, D A Jones, B S Marshall.
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Year: 1985 PMID: 3931780 PMCID: PMC1416937 DOI: 10.1136/bmj.291.6501.1039
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623