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. 2019 Apr 6;6:11. doi: 10.1186/s40662-019-0136-3

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© The Author(s). 2019

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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 4 — Correlations of systolic blood pressure with BFV of the retina and conjunctiva. The BFV of the conjunctiva had no significant correlation with systolic blood pressure (r = 0.03, P = 0.85, a). On the other hand, BFV of retinal arterioles was positively correlated with systolic blood pressure (r = 0.34, P = 0.01, b). No significant correlation was found between the BFV of retinal venules and systolic blood pressure (r = 0.21, P = 0.13, b)