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. Author manuscript; available in PMC: 2021 Jul 31.
Published in final edited form as: Physiol Meas. 2019 Feb 26;40(2):025005. doi: 10.1088/1361-6579/ab033d

Figure 3:

Figure 3:

GUI used to manually annotate the number of beats in the Guatemala RCT dataset. Annotators listened to each 3.75 s segment, counting and recording the number of audible beats.