| Literature DB >> 3085791 |
A Wright, F P Ryan, S E Willingham, S Holt, A C Page, M O Hindle, C D Franklin.
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Year: 1986 PMID: 3085791 PMCID: PMC1340244 DOI: 10.1136/bmj.292.6530.1237
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623