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Lookup NU author(s): Christopher CowieORCiD
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Author(s): Cowie CJA
Publication type: Letter
Publication status: Published
Journal: BMJ
Year: 2013
Volume: 347
Print publication date: 04/09/2013
ISSN (print): 0959-535X
ISSN (electronic): 1756-1833
URL: http://dx.doi.org/10.1136/bmj.f5360
DOI: 10.1136/bmj.f5360