Correspondence

Why Thirty Per Cent

Br Med J 1970; 2 doi: https://doi.org/10.1136/bmj.2.5711.726 (Published 20 June 1970) Cite this as: Br Med J 1970;2:726

Article usage

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Usage statistics: December 2010 to December 2015

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Dec 2010002
Feb 2011001
Mar 2011001
Apr 2011001
Dec 2011001
Feb 2012001
Dec 2015002
Total009