Transcranial Direct Current Stimulation for Post-Concussion Syndrome: Study Protocol for a Randomized Crossover Trial - Amorim, Robson Luis Oliveira; Brunoni, André Russowsky; Oliveira, Mirian Akiko Furutani de; Zaninotto, Ana Luiza Costa; Nagumo, Marcia Mitie; Guirado, Vinícius Monteiro de Paula; Neville, Iuri Santana; Benute, Gláucia Rosana Guerra; Lucia, Mara Cristina Souza de; Paiva, Wellingson Silva; Andrade, Almir Ferreira de; Teixeira, Manoel Jacobsen (Frontiers in neurology, 2017)