Brazilian Journal of Medical and Biological Research v.39 n.11 2006 Brazilian Journal of Medical and Biological Research Associação Brasileira de Divulgação Científica (ABDC) instacron:ABDC Brazilian Journal of Medical and Biological Research, Vol 39, Iss 11, Pp 1417-1423 (2006) ResearcherID Brazilian Journal of Medical and Biological Research, Volume: 39, Issue: 11, Pages: 1417-1423, Published: 25 SEP 2006