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. 2018 Jul 30;4:20. doi: 10.1038/s41378-018-0019-0

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 7 — Selected data plotted to MATLAB from 10-minute experiment with human blood cells flowing through a 30-μm-wide channel during an experiment with a duration of 10 min a without modification b after applying a Butterworth band-pass filter using the Signal Processing Toolbox. The red dashed line represents the negative threshold voltage of −0.2 V, and the green dashed line appears for peaks which included in the final count