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. 2018 Jul 28;124(8):161. doi: 10.1007/s00340-018-7030-x

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.

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Fig. 5 — Laser-based photoacoustic detector (ETD-300, Sensor Sense) in the cardiothoracic surgery department at Harefield hospital, UK (photo by S. Cristescu)