TABLE 5.

The top 10 co-cited references in research of transcranial direct current stimulation (tDCS).

Ranking	Co-cited references	Frequency	Centrality	Year
1	Lefaucheur et al., 2017	337	0.12	2017
2	Bikson et al., 2016	270	0.03	2016
3	Woods et al., 2016	258	0.01	2016
4	Batsikadze et al., 2013	200	0.05	2013
5	Brunoni et al., 2012	198	0.00	2012
6	Stagg et al., 2011	183	0.01	2011
7	Jacobson et al., 2012	177	0.00	2012
8	Nitsche et al., 2008	168	0.01	2008
9	Wiethoff et al., 2014	167	0.13	2014
10	Horvath et al., 2015	157	0.66	2015