Intended for healthcare professionals

Research Article

Commonwealth links.

Br Med J 1967; 4 doi: https://doi.org/10.1136/bmj.4.5580.636 (Published 16 December 1967) Cite this as: Br Med J 1967;4:636

Article usage

Article metrics provide readers and authors with an indication of how often a specific article has been accessed month by month. It counts three formats - abstract/extract, full text and pdf. The page is updated each day.

Usage statistics: July 2009 to November 2020

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