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. 2019 Oct 22;7:427. doi: 10.3389/fped.2019.00427

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Copyright © 2019 Dekker, Hooper, Croughan, Crossley, Wallace, McGillick, DeKoninck, Thio, Martherus, Ruben, Roehr, Cramer, Flemmer, Croton, te Pas and Kitchen.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Variability in inter-breath interval and respiratory rate of rabbit kittens during the experiment. (A) Variability in inter-breath interval during phase 1 (before apnea). (B) Variability in inter-breath interval during phase 2 (after apnea). (C) Respiratory rate during phase 1 (before apnea). (D) Respiratory rate during phase 2 (after apnea). (E) Heart rate during phase 1 (before apnea). (F) Heart rate during phase 2 (after apnea). ^*p < 0.05.