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. 2016 May 6;6:25557. doi: 10.1038/srep25557

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(a) Assembly of the microfluidic device. (b) Loading and solidification of MC hydrogel in the microchannel. (c) Loading of cells in serum-free medium in one reservoir and medium with 20% FBS in another reservoir. The microfluidic device was then transferred in an incubator. Impedance measurement was conducted by measuring each pair of electrodes using an impedance analyzer.