Brazilian Journal of Medical and Biological Research, Volume: 45, Issue: 11, Pages: 1086-1094, Published: NOV 2012 Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Brazilian Journal of Medical and Biological Research Brazilian Journal of Medical and Biological Research, Vol 45, Iss 11, Pp 1086-1094 (2012) Brazilian Journal of Medical and Biological Research v.45 n.11 2012 Associação Brasileira de Divulgação Científica (ABDC) instacron:ABDC