| Literature DB >> 6786427 |
T J Beattie, A V Murphy, M L Willoughby, S J Machin, G Defreyn.
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Year: 1981 PMID: 6786427 PMCID: PMC1505665 DOI: 10.1136/bmj.282.6277.1667
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623