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. 2017 Mar 28;7:464. doi: 10.1038/s41598-017-00552-7

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© The Author(s) 2017

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Mapping of the good ROIs distribution. Images in the left column calculated during the first occlusion whereas those in the right column are in the second occlusion that started 10 s later the cuff was deflated. Yellow and blue squares show ROIs with the linear and distorted PPG waveforms, respectively.