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. 2020 Jan 20;20:17. doi: 10.1186/s12871-020-0931-3

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© The Author(s). 2020

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. 2 — Response of each subject to predetermined end-tidal sevofluane concentrations. Closes circles represent no response to the vocal command and open circles represent response to command. The dotted line between points of and showed seven crossovers of responses. a, MACawake of sevoflurane in patients with sleep disorders. b, MACawake of sevoflurane in the control group