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Br Med J 1918; 1 doi: https://doi.org/10.1136/bmj.1.2995.592 (Published 25 May 1918) Cite this as: Br Med J 1918;1:592This is a PDF-only article. The first page of the PDF of this article appears above.
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This is a PDF-only article. The first page of the PDF of this article appears above.