1. Department of Obstetrics and Gynaecology; Aarhus University Hospital; Aarhus N; Denmark
2. Department of Obstetrics and Gynaecology; Kolding Hospital; Kolding; Denmark
3. Department of Obstetrics and Gynaecology; Aalborg University Hospital; Aalborg; Denmark
4. Department of Obstetrics and Gynaecology; Regional Hospital of Viborg; Viborg; Denmark
5. Department of Obstetrics and Gynaecology; Regional Hospital of Randers; Randers; Denmark
6. Department of Obstetrics and Gynaecology; Regional Hospital of Herning; Herning; Denmark
7. Department of Obstetrics and Gynaecology; Odense University Hospital; Odense; Denmark
8. Department of Paediatrics; Aarhus University Hospital; Aarhus N; Denmark