1. CDMFUniversidade Federal de São Carlos P.O. Box 676, 13565–905 São Carlos, São Paulo Brazil
2. Laboratory of Applied Immunology, Department of Genetics and EvolutionUniversidade Federal de São Carlos P.O. Box 676, 13565–905, São Carlos São Paulo Brazil
3. Department of Analytical and Physical ChemistryUniversity Jaume I (UJI) Castelló 12071 Spain