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. 2014 Nov 28;15(1):136. doi: 10.1186/s12931-014-0136-8

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© Meyer et al.; licensee BioMed Central Ltd. 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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Course of sensitivity and specificity as a function of the number of VOCs involved in the discriminant analyses. The sensitivity and specificity to discriminate between asthma and healthy subjects depends on the number of VOCs (A). The correct classification of asthma and healthy subjects as a function of the VOCs is presented (B).