| Literature DB >> 12480856 |
James F Kirwan1, Julia A Nightingale, Catey Bunce, Richard Wormald.
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Year: 2002 PMID: 12480856 PMCID: PMC138518 DOI: 10.1136/bmj.325.7377.1396
Source DB: PubMed Journal: BMJ ISSN: 0959-8138