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. 2018 Apr 1;18(4):1056. doi: 10.3390/s18041056

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Time series of PM2.5 concentrations with 1 min resolution from the mobile test run in the area of Thessaloniki, Greece on 9 March 2017. The two fitted linear regression models are compared with the readings of the optical particle sizer.