Do, K. Q., Lauer, C. J., Schreiber, W., Zollinger, M., Gutteck-Amsler, U., Cuénod, M., et al. (1995). γ-glutamylglutamine ant taurine concentrations are decreased in the cerebrospinal fluid of drug-naive patients with schizophrenic disorders. Journal of Neurochemistry, 65, 2652-2662.