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. 2017 Sep 28;181(13):347. doi: 10.1136/vr.104370

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© British Veterinary Association (unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

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FIG 1: — Recruitment and analysis of data through the different phases of the systematic review (from Moher and others²³).