1. Department of Gynaecology, Coimbra Hospital and University Centre, Coimbra, Portugal
2. Department of Obstetrics-A, Coimbra Hospital and University Centre, Coimbra, Portugal
3. Faculty of Medicine, University of Coimbra, Coimbra, Portugal
4. Faculty of Medicine, Gynaecology University Clinic, University of Coimbra, Coimbra, Portugal