1. Department of Obstetrics and Gynecology, São João Hospital and University Centre, Porto, Portugal
2. Casa de Saúde da Boa Vista, Porto, Portugal
3. Department of Obstetrics and Gynecology, Tâmega Sousa Hospital Centre (CHTS), Penafiel, Portugal
4. Department of Obstetrics and Gynecology, North Maternal and Child Centre (CMIN), Porto, Portugal
5. Gynaecology Service, Coimbra Hospital and University Centre, Coimbra, Portugal
6. Clinical Academic Centre of Coimbra (CACC), University Clinic of Gynaecology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
7. Department of Obstetrics and Gynecology, Pedro Hispano Hospital, Matosinhos, Portugal
8. Department of Obstetrics and Gynecology, CUF Descobertas Hospital, Lisbon, Portugal
9. Coimbra Medical Institute, Coimbra, Portugal
10. Department of Obstetrics and Gynecology, CUF Coimbra Hospital, Coimbra, Portugal