Brazilian Journal of Medical and Biological Research, Vol 47, Iss 6, Pp 461-469 (2014) Brazilian Journal of Medical and Biological Research, Volume: 47, Issue: 6, Pages: 461-469, Published: JUN 2014 Brazilian Journal of Medical and Biological Research v.47 n.6 2014 Brazilian Journal of Medical and Biological Research Associação Brasileira de Divulgação Científica (ABDC) instacron:ABDC