Brazilian Journal of Medical and Biological Research, Vol 46, Iss 9, Pp 809-814 (2013) Brazilian Journal of Medical and Biological Research Brazilian Journal of Medical and Biological Research v.46 n.9 2013 Associação Brasileira de Divulgação Científica (ABDC) instacron:ABDC Brazilian Journal of Medical and Biological Research, Volume: 46, Issue: 9, Pages: 809-814, Published: 06 SEP 2013