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. 2020 Apr 16;21(8):2786. doi: 10.3390/ijms21082786

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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/).

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Survival fraction of A549 (a,b) and CT26 (c,d) cells in the presence of sulfonate ester porphyrins as a function of applied red-light doses. The data shown are the means ± SEM of three independent experiments.