- Correspondence to Dr Sonia Isoyama Venancio, Instituto de Saúde, Secretaria Estadual de Saúde de São Paulo (SES-SP), Rua Santo Antônio 590, 5 andar. Bela Vista, São Paulo, SP 01314-000, Brazil;
- Accepted September 12, 2011
- First published November 11, 2011.
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