1. Institute of Biosciences, Sao Paulo State University, UNESP, Botucatu, Sao Paulo, Brazil.
2. Department of Urology, Faculty of Medicine, Sao Paulo State University, UNESP, Botucatu, Sao Paulo, Brazil.
3. Department of Pathology, Faculty of Medicine, Sao Paulo State University, UNESP, Botucatu, Sao Paulo, Brazil.
4. AC Camargo Hospital, Sao Paulo, Sao Paulo, Brazil.