Transcranial Direct Current Stimulation Combined with Aerobic Exercise to Optimize Analgesic Responses in Fibromyalgia: A Randomized Placebo-Controlled Clinical Trial - Mendonca, Mariana E.; Simis, Marcel; Grecco, Luanda C.; Battistella, Linamara R.; Baptista, Abrahão F.; Fregni, Felipe (Frontiers in Human Neuroscience, 2016)