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Closed‐loop wearables. a) A wearable device for glucose monitoring and drug‐delivery that can wirelessly communicates with smartphones via Bluetooth. Reproduced with permission.167 Copyright 2016, Nature Publishing Group. b) A microfluidic bandage on the arm. The wearable device consists of a capacitive touch detector, a temperature sensor, and a drug delivery pump. Reproduced with permission.168 Copyright 2014, Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim.
