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. 2017 Nov 17;17:386. doi: 10.1186/s12884-017-1574-3

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© The Author(s). 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 5 — Intra-oral vacuum traces of a breastfeed for 2 preterm infants (a) this infant displays peak vacuums between −90 mmHg and – 250 mmHg and is able to maintain suck bursts with more than 10 sucks per burst (b) this infant applies peak vacuum between −10 mmHg and −150 mmHg and often has less than 10 sucks per suck burst and longer pauses than infant (a)