1. Department of Surgery and Anatomy, School of Medicine of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
2. Proctogastroclinic, Ribeirão Preto, São Paulo, Brazil
3. Department of Gynecology, School of Medicine of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
4. Fecunditá Clinic, São Paulo, Brazil