Brazilian Journal of Pharmaceutical Sciences, Volume: 45, Issue: 4, Pages: 693-700, Published: DEC 2009 Brazilian Journal of Pharmaceutical Sciences; Vol. 45 No. 4 (2009); 693-700 Brazilian Journal of Pharmaceutical Sciences; Vol. 45 Núm. 4 (2009); 693-700 Brazilian Journal of Pharmaceutical Sciences; v. 45 n. 4 (2009); 693-700 Brazilian Journal of Pharmaceutical Sciences Universidade de São Paulo (USP) instacron:USP Brazilian Journal of Pharmaceutical Sciences, Vol 45, Iss 4, Pp 693-700 (2009)