Reducing Transcranial Direct Current Stimulation-Induced Erythema With Skin Pretreatment: Considerations for Sham-Controlled Clinical Trials - Guarienti, Fabiana; Caumo, Wolnei; Shiozawa, Pedro; Cordeiro, Quirino; Boggio, Paulo S.; Benseñor, Isabela M.; Lotufo, Paulo A.; Bikson, Marom; Brunoni, Andre Russowsky (Neuromodulation, 2015)