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. 1912 Sep;9(3):266–270.

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Obstetrics and Gynecology

Editor: J W Ballantyne¹

¹Physician, Edinburgh Royal Maternity Hospital, etc.

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: PMC5260686

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