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. 2019 Dec 2;9:18021. doi: 10.1038/s41598-019-54226-7

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© The Author(s) 2019

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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Concentrations of the three anti-VEGF biologics before and after storage in silicone oil-free plastic syringes. Undiluted and diluted (1:10) samples collected at day 0 (D0) shown in black, and day 7 (D7) shown in blue for (a) ranibizumab, (b) aflibercept and (c) bevacizumab. Measurements are presented as mean ± SD. For each sample set n = 6. The unpaired Student’s t-test was used for statistical analysis.