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. 2013 Aug 9;8(1):54. doi: 10.1186/2049-6958-8-54

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Copyright © 2013 Zanforlin et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Measure of the diaphragmatic excursion in spontaneous breathing (A), on average 1.8 cm. Measure of the diaphragmatic excursion in forced respiration (B), on average 7.8 cm. t_i, inspiratory time; t_e, expiratory time.