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. 2014 Jul 9;14:701. doi: 10.1186/1471-2458-14-701

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Copyright © 2014 Jiang et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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Correlations among Hb, sO₂, and symptoms. (A) Curve fitting analysis of Hb concentration and sO₂. (B) Mean sO₂ in the groups with an Hb of <200 and ≥200 g/L. (C) Curve fitting analysis of Hb concentration and total symptom score. (D) Total symptom score in the groups with an Hb of <200 and ≥200 g/L. (E) Hb in the groups with an Hb of <200 and ≥200 g/L. (F) CMS scores in the groups with an Hb of <200 and ≥200 g/L. (G) Altitude in the groups with an Hb of <200 and ≥200 g/L.