1. Beginnings Assisted Conception Unit, Epsom and St Helier University Hospitals, London, UK
2. Institute for Clinical Trials and Methodology, University College London, London, UK
3. MRC CTU, Institute for Clinical Trials and Methodology, University College London, London, UK
4. Primary Care & Population Health, Institute of Epidemiology & Health, University College London Hospitals, London, UK
5. Research Department of Oncology, Cancer Institute, University College London Hospitals, London, UK
6. Healthy Whole Me, London, UK
7. Reproductive Medicine Unit, Institute for Women’s Health, University College London Hospitals, London, UK