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. 2020 May 27;33(6):793–807. doi: 10.1007/s10334-020-00853-5

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© The Author(s) 2020

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Fig. 3 — Close-up view of the tES electrode, gel patch, and wire. a Square electrode and rectangular gel patch. b Square electrode and rectangular gel patch with chamfered corners. c Hollow cylinder electrode and cylindrical gel patch. d Triangular electrode and triangular gel patch