1. Department of Obstetrics and Gynaecology, Dr Gray's Hospital, Elgin, UK
2. Department of Obstetrics and Gynaecology, Dumfries and Galloway Royal Infirmary, Dumfries, UK
3. Queen Charlotte's, Chelsea and Westminster Hospital, Imperial College London, London, UK
4. The Internet Design Shop, Dumfries, UK
5. Medical Statistics Team, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK