[1] Univ Sao Paulo, Dept Neurosci & Behav Sci, BR-14025048 Ribeirao Preto, SP, Brazil
[2] Univ Alberta, Dept Psychiat, Edmonton, AB, Canada
[3] Univ Sao Paulo, Ribeirao Preto Sch Med, Dept Internal Med, Div Nucl Med, BR-14025048 Ribeirao Preto, SP, Brazil