Acute biphasic effects of ayahuasca - Schenberg, Eduardo Ekman; Alexandre, Joao Felipe Morel; Filev, Renato; Cravo, André Mascioli; Sato, João Ricardo; Muthukumaraswamy, Suresh D; Yonamine, Maurício; Waguespack, Marian; Lomnicka, Izabela; Barker, Steven A; Silveira, Dartiu Xavier da (PLOS ONE, 2015)