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. 2013 May 1;8(5):e62072. doi: 10.1371/journal.pone.0062072

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© 2013 He et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Data are presented as mean ± SD. Symptom scores recorded on the 3^rd day after return to low-altitude areas served as baseline values. Rate of change 1 = (score on 50^th day-score on 3^rd day)/score on 3^rd day×100%; rate of change 2 = (score on 100^th day-score on 3^rd day)/score on 3^rd day×100%. Rates of change 1 and 2 showed no significant difference between the Chongqing and Kunming groups (P>0.05).