Jardine Jennifer, Harris Tina, Khalil Asma, van der Meulen Jan
Royal College of Obstetricians and Gynaecologists, London SE1 1SZ, UK; Department of Health Services Research, London School of Hygiene & Tropical Medicine, London, UK.
Centre for Reproduction Research, Faculty of Health and Life Sciences, De Montfort University, Leicester, UK.
Lancet. 2022 May 28;399(10340):2014. doi: 10.1016/S0140-6736(22)00171-4.