| Literature DB >> 7819869 |
M Pearson, R Lewis, J Watson, J Ayres, G Ibbotson, D Ryan, D Flynn, J Williams.
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Year: 1994 PMID: 7819869 PMCID: PMC2541372 DOI: 10.1136/bmj.309.6966.1440
Source DB: PubMed Journal: BMJ ISSN: 0959-8138