1. Division of Biomedical Sciences, Clinical Science Research Laboratories, Warwick Medical School, University of Warwick, Coventry CV2 2DX, UK
2. Reproductive Immunology and Implantation, Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, Brussels, Belgium
3. Division of Child Health, Obstetrics & Gynaecology, School of Medicine, University of Nottingham, Queen's Medical Centre, Nottingham NG7 2UH, UK
4. Department of Obstetrics and Gynaecology, Addenbrooke's Hospital, Cambridge CB2 0QQ, UK
5. Department of Reproductive Medicine, KK Women's and Children's Hospital, 100 Bukit Timah Road, Singapore 229899, Singapore
6. KK Research Centre, KK Women's and Children's Hospital, 100 Bukit Timah Road, Singapore 229899, Singapore
7. Nurture Fertility, The East Midlands Fertility Centre, Bostocks Lane, Nottingham NG10 5QG, UK
8. Obstetrics & Gynaecology—Academic Clinical Program, Duke-NUS Medical School, 8 College Road, Singapore 169857, Singapore
9. Department of Obstetrics and Gynaecology, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK