1. Surgery Department, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, RS, Brazil
2. Postgraduate Program in Health Sciences: Gynecology and Obstetrics, Universidade Federal do Rio Grande do Sul, RS, Brazil
3. Pediatric Urology Department, Fundació Puigvert, Barcelona, Spain
4. Gynecology and Obstetrics Department, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, RS, Brazil
5. Urology Department, Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, RS, Brazil