1. Institute of Maternal and Child Research; School of Medicine; University of Chile; Santiago Chile
2. Urology Department; San Borja Arriarán Clinical Hospital; Santiago Chile
3. Urology Department; José Joaquín Aguirre Clinical Hospital; School of Medicine; University of Chile; Santiago Chile
4. Urology Department; Clínica Las Condes; Santiago Chile
5. Pathology Department; Clínica Las Condes; Santiago Chile