Clinical predictors of ketamine response in treatment-resistant major depression.
Niciu MJ, Luckenbaugh DA, Ionescu DF, Guevara S, Machado-Vieira R, Richards EM, Brutsche NE, Nolan NM, Zarate CA. Clinical predictors of ketamine response in treatment-resistant major depression. J Clin Psychiatry. 2014 May; 75(5):e417-23.