1. Department of Pathology, School of Medicine of Botucatu, São Paulo State University (UNESP), Botucatu, Brazil.
2. Department of Microbiology and Immunology, Institute of Biosciences of Botucatu, São Paulo State University (UNESP), Botucatu, Brazil.
3. Hospital Amaral Carvalho, Laboratory of Flow Cytometry Jaú, Brazil.