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. 2020 May 9;25(9):2239. doi: 10.3390/molecules25092239

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© 2020 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/).

PMC Copyright notice

Tools available to detect middle ear infection. (a) Diffuse reflectance spectroscopy. Reproduced with permission from [68]. Copyright IOP Publishing, 2017. (b) Fluorescence otoscope. Reproduced with permission from [72], Copyright American Chemical Society, 2014.