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. 2018 Mar 13;8:4393. doi: 10.1038/s41598-018-22828-2

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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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Sensory hair cells in the lateral line of whole zebrafish larvae at 4 dpf. White arrows (a and b) show the lateral line hair cells in a zebrafish larva incubated with FPNPs (2 mg mL⁻¹) from 2 to 4 dpf. (a) Fluorescence image, (b) Merged image with DIC. Enlarged images of (c) cranial neuromasts and (d) trunk neuromasts. The fluorescence was determined at 543 nm with excitation at 405 nm. Scale bars: 200 μm (a,b), 50 μm (c,d).