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. 1849 Jul;4(7):183–205.

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The Cyclopædia of Anatomy and Physiology

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.

PMC Copyright notice

PMCID: PMC5204441 PMID: 30164969

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