Proton magnetic resonance spectroscopy of the frontal lobe in schizophrenics: a critical review of the methodology - Sanches, Rafael Faria; Crippa, José Alexandre de Souza; Hallak, Jaime Eduardo Cecílio; Araújo, David; Zuardi, Antonio Waldo (Revista do Hospital das Clínicas da Faculdade de Medicina de São Paulo, 2004)