- Correspondence to Dr Sobreira, Departamento de Neurologia Psiquiatria e Psicologia Médica, HC sala 536, Faculdade de Medicina de Ribeirão Preto, USP, Campus Universitário Monte Alegre, Ribeirão Preto-SP, Brazil, 14048-900;
- Received November 10, 2002
- Accepted March 21, 2003
- Revised March 8, 2003
- First published August 21, 2003.
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