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. Author manuscript; available in PMC: 2019 Mar 20.
Published in final edited form as: Int J Biosens Bioelectron. 2018 Aug 6;4(4):195–202. doi: 10.15406/ijbsbe.2018.04.00125

Figure 3.

Figure 3

A) PPG signal B) PPG first derivative C) PPG second derivative.