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Vital Statistics
Br Med J 1961; 1 doi: https://doi.org/10.1136/bmj.1.5228.836 (Published 18 March 1961) Cite this as: Br Med J 1961;1:836
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.