| Literature DB >> 6802428 |
J C Robertson, M G Helliwell, E G Cantrell, M I Cawley, R M Ellis.
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Year: 1982 PMID: 6802428 PMCID: PMC1497955 DOI: 10.1136/bmj.284.6322.1114-d
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623