1. Imperial College London, London, United Kingdom
2. Duke University, Durham, NC, USA
3. Duke University & Oxford University, Durham, NC, USA
4. Oxford University & Oxford University & Royal Children's Hospital, Oxford, United Kingdom
5. Oxford University, Oxford, United Kingdom
6. Monash IVF Group & University of Western Australia & Edith Cowan University, Southport, Australia
7. Qingdao United Family Hospital, Qingdao, China