Effect of transcranial direct current stimulation on exercise performance: a systematic review and meta-analysis - Machado, Daniel Gomes da Silva; Unal, Gozde; Andrade, Suellen Mary Marinho dos Santos; Moreira, Alexandre; Altimari, Leandro Ricardo; Brunoni, Andre Russowsky; Perrey, Stephane; Mauger, Alexis R.; Bikson, Marom; Okano, Alexandre Hideki (Brain Stimulation, 2019)