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. 2014 Nov 30;18(6):644. doi: 10.1186/s13054-014-0644-4

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© Romagnoli et al.; licensee BioMed Central. 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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Bland-Altman plots in the resonance (R-group) (a, c, e) and the non-resonance (NR)-group (b, d, f). Sys, systolic; Dia, diastolic; IBP, invasive blood pressure monitoring; NIBP, non-invasive blood pressure monitoring.