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. 1889 Apr;34(10):956–958.

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Periscope of State Medicine

J Allan Gray, M.A., M.D. Edin., F.R.C.P.E.

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This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License, which permits non-commercial use and redistribution provided that the original author and source are credited.

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PMCID: PMC5284789

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