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Br Med J 1914; 1 doi: https://doi.org/10.1136/bmj.1.2777.656 (Published 21 March 1914) Cite this as: Br Med J 1914;1:656This 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.