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Lookup NU author(s): Dr Richard Porter, Professor John O'Brien
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Author(s): Porter RJ, O'Brien JT
Publication type: Letter
Publication status: Published
Journal: British Medical Journal
Year: 1998
Volume: 316
Issue: 7131
Pages: 631-631
Print publication date: 21/02/1998
ISSN (print): 0959-8138
ISSN (electronic): 1756-1833
URL: http://www.bmj.com/content/316/7131/631.1.full