Down-regulation of tinnitus negative valence via concurrent HD-tDCS and PEI technique: a pilot study - Vaziri, Zahra; Salmon, Carlos Ernesto Garrido; Ghodratitoostani, Iman; Santos, Antonio Carlos dos; Hyppolito, Miguel Angelo; Delbem, Alexandre Cláudio Botazzo; Leite, João Pereira (Brain Sciences, 2023)