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Lookup NU author(s): Dr Stephen Ball
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Author(s): Pattman S, Davison A, Ball S
Publication type: Letter
Publication status: Published
Journal: British Medical Journal
Year: 2012
Volume: 344
Pages: e2456
Print publication date: 02/04/2012
ISSN (print): 0959-535X
ISSN (electronic): 1756-1833
URL: http://dx.doi.org/10.1136/bmj.e2456
DOI: 10.1136/bmj.e2456