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. 1924 Mar;6(1):142.

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Klassiker Der Medizin

Reviewed by: David Riesman

David Riesman, M.D.

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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: PMC7939334

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