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. 2015 Mar 3;6:6269. doi: 10.1038/ncomms7269

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(a) Pressure sensitivity of the SGOTFT device under different V_GS. The error bars represent 1 s.d. (b) Photograph of battery-powered SGOTFT attached to the artery of the wrist. (c) The signal curves of real-time pulse wave under different voltages. (d) A magnified curve of average pulse wave signal from five devices (separate measurement): P1, P2 and diastolic wave are observed clearly.