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. 2016 Sep 9;11(1):123. doi: 10.1186/s13023-016-0508-x

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© The Author(s). 2016

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. 2 — Correlations between systolic and diastolic blood pressures and mean phenylalanine levels in patients with phenylketonuria and mild hyperphenylalaninaemia. a Quadratic correlation between systolic blood pressure and median Phe levels. Statistical significance was observed (p < 0.001). b Linear correlation between diastolic blood pressure and median Phe levels. Statistical significance was observed (p < 0.001). Phe: phenylalanine (μmol/L); BP: blood pressure (mmHg)