1. Department of Gynaecology Royal Hospital for Women New South Wales Sydney Australia
2. Department of Gynaecology University of New South Wales New South Wales Sydney Australia
3. Department of Gynaecology Prince of Wales Hospital New South Wales Sydney Australia
4. Department of Gynaecology Westmead Hospital New South Wales Sydney Australia
5. Department of Gynaecology Sydney University New South Wales Sydney Australia
6. Department of Obstetrics and Gynaecology Sahlgrenska Academy Gothenburg Sweden
7. The Faculty of Medicine University of Gothenburg Sweden Gothenburg Sweden
8. Department of Clinical Pathology South‐Eastern Area Laboratory Services New South Wales Sydney Australia