Brazilian Journal of Medical and Biological Research, Volume: 47, Issue: 4, Pages: 273-278, Published: 21 MAR 2014 Brazilian Journal of Medical and Biological Research v.47 n.4 2014 Brazilian Journal of Medical and Biological Research Associação Brasileira de Divulgação Científica (ABDC) instacron:ABDC Brazilian Journal of Medical and Biological Research, Vol 47, Iss 4, Pp 273-278 (2014)