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. 2015 Dec 4;31:137–144. doi: 10.1007/s10103-015-1839-x

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© The Author(s) 2015

Open Access This 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. 4 — Mean PpIX intensity ratios I ₆₃₆/I ₆₀₀ with standard error of the mean at 0, 1.5, 4.5, 6, and 23 h after 5-ALA administration obtained from the BE tissue on the CAM (a), the CAM adjacent to the BE tissue (b), and the CAM only (c)