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. 2020 Nov 30;6:107. doi: 10.1038/s41378-020-00216-z

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© The Author(s) 2020

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. 5 — a A flow channel in an MFBB was opened, and the flow through the channel was measured. After 1 min, the flow was stopped by pressurizing the control channel in the MFBB through the FCB. Then, the MFBB was disabled, and the pressure to the FCB for the MFBB control channels was released. After more than 17 h, the MFBB was re-enabled, and the flow channel was reopened. b Schematic representation of enabling (ON) and disabling (OFF) the MFBB. c Video frames of sequential MFBB operation