1. School of Medicine; University of Nottingham; Nottingham UK
2. Department of Obstetrics; Queen's Medical Centre; Nottingham University Hospitals NHS Trust UK; Nottingham UK
3. School of Life Sciences; University of Nottingham; Nottingham UK
4. Department of Obstetrics and Gynaecology; University Hospitals KU; Leuven Belgium
5. Department of Nutrition; Faculty of Medicine; University of Oslo; Oslo Norway
6. Department of Anaesthetics; Ashford and St Peters Hospital NHS Trust UK; Ashford UK
7. School of Nursing and Department of Health Sciences; Queen's University; Kingston ON Canada