Acute working memory improvement after tDCS in antidepressant-free patients with major depressive disorder - Oliveira, Janaina F; Zanão, Tamires A; Valiengo, Leandro; Lotufo, Paulo Andrade; Benseñor, Isabela Judith Martins; Fregni, Felipe; Brunoni, André Russowsky (Neuroscience Letters, 2013)