Study	Reason for exclusion
Fiori 2011	Not a genuine RCT (pseudo‐randomisation of intervention)
Fridriksson 2011	Not a genuine RCT
Holland 2011	Not a genuine RCT (pseudo‐randomisation of intervention)
Lee 2013	Inappropriate comparator intervention (2 different applications of tDCS have been compared)
Monti 2008b	In order to test the specificity of findings of Monti 2008a, this trial stimulated a biological implausible area (occipital cortex) to improve aphasia and therefore has been excluded
NCT02514044	Irrelevant comparison: both groups received tDCS
NCT03486782	Irrelevant comparison: all 3 groups received anodal tDCS
Richardson 2015	Irrelevant comparison: both groups received tDCS
Vines 2011	Not a genuine RCT

RCT: randomised controlled trial
 tDCS: transcranial direct current stimulation