El-Hagrassy MM, Vaz de Macedo A, Ercan Dogan A, Piza P, Kim KY, Kaiser de Souza D, Moreno JB, Riba L, Alsammani M, Romero PT, Neme G, Malpica PS, Ferreira CHF, Cáceres GC, Bendezu-Quispe G, Camargo CP, De Lavallaz J, Vespoli S, Corrales M, Reggane M, Norberto Z do N, Dantas ACB, Vidal OLC, Filho FAF, Nguyen TV, Fregni F. Cognitive effects of anodal transcranial direct current stimulation and high-dose cocoa flavonoids on an acutely sleep-deprived, highly educated population: a proposed single-center, phase II, randomized, placebo-controlled, double-blind, factorial study. PPCR [Internet]. 2018 Jul. 25 [cited 2023 Feb. 8];4(1):27-35. Available from: https://journal.ppcr.org/index.php/ppcrjournal/article/view/63