1. Department of Obstetrics and Gynecology, Hospital das Clínicas; São Paulo University Medical School; São Paulo; SP; Brazil
2. Department of Pediatric Surgery, Hospital das Clínicas; São Paulo University Medical School; São Paulo; SP; Brazil
3. Department of Pediatrics, Hospital das Clínicas; São Paulo University Medical School; São Paulo; SP; Brazil
4. Department of Pathology, Hospital das Clínicas; São Paulo University Medical School; São Paulo; SP; Brazil