Efficacy of electroconvulsive therapy augmentation for partial response to clozapine: a pilot randomized ECT – sham controlled trial - Melzer-Ribeiro, Debora Luciana; Rigonatti, Sergio Paulo; Kayo, Monica; Avrichir, Belquiz S.; Ribeiro, Rafael Bernardon; Santos, Bernardo Dos; Fortes, Marisa; Elkis, Helio (Revista de Psiquiatria Clínica, 2017)