1. Regional Hospital of Randers; Department of Obstetrics and Gynecology; Skovlyvej 1 Randers Denmark 8930
2. Aarhus University Hospital; Department of Obstetrics and Gynecology; Brendstrupgaardsvej 100 Aarhus N Denmark 8200
3. Academic Medical Center; Department of Obstetrics and Gynaecology; Meibergdreef 9 Amsterdam Netherlands 1105 AZ
4. Monash University; Department of Obstetrics and Gynaecology; 246 Clayton Road Clayton Victoria Australia 3168
5. University of Nottingham; Division of Child Health, Obstetrics and Gynaecology, School of Medicine; Nottingham City Hospital NHS Trust Hucknall Road Nottingham Nottinghamshire UK NG5 1PB