1. Postgraduate program in Health Sciences, Universidade Federal de Goiás, Goiania, Brazil
2. Department of Obstetrics and Gynaecology, Hospital das Clínicas, Universidade Federal de Goiás, Goiania, Brazil
3. Department of Obstetrics and Gynecology, Pediatrics and Physiology, Division of Maternal-Fetal Medicine, Mayo Clinic College of Medicine and Science, Rochester, MN, USA