| Literature DB >> 3105752 |
P A Kalra, J A Guthrie, J B Dibble, J H Turney, A M Brownjohn.
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Year: 1987 PMID: 3105752 PMCID: PMC1245867 DOI: 10.1136/bmj.294.6575.808
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623