Resting-state functional connectivity analysis in Post-Acute Cognitive Impairment Sequelae of COVID-19 (PASC) after treatment with portable brain stimulation: an double-blind, randomized study - Pedro Henrique Rodrigues da Silva; Kallene Vidal; Beatriz Cavendish; Alisson Lima; Adriano Neto; Mariana Batista; Rebeca Pelosof; Bianca Pinto; Andre Russowsky Brunoni (Brain Stimulation)