1. Ward 315 Department of Gynaecology Aberdeen Royal Infirmary Aberdeen UK
2. Medical Statistics Team Division of Applied Health Sciences University of Aberdeen Aberdeen UK
3. Dugald Baird Centre Aberdeen Maternity Hospital Aberdeen UK
4. Department of Obstetrics and Gynaecology University Hospitals of Southampton Southampton UK
5. MRC Centre for Reproductive Health University of Edinburgh Edinburgh UK
6. Head of Division of Applied Health Sciences School of Medicine and Dentistry University of Aberdeen Aberdeen UK