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Healthcare Technology Letters > 2017 > 4 > 2 > 57 - 63
IET Science, Measurement & Technology > 2016 > 10 > 8 > 963 - 971
Electronics Letters > 2016 > 52 > 17 > 1430 - 1432
Healthcare Technology Letters > 2014 > 1 > 4 > 98 - 103