1. EGA Institute for Women's Health; Faculty of Population Health Sciences; University College London; London UK
2. Fetal Medicine Unit; Department of Obstetrics and Gynecology; St George's Hospital; London UK
3. Department of Radiology and Imaging Sciences; University of Utah Health Sciences Center; Salt Lake City UT USA
4. Department of Obstetrics; Saint Luc University Hospital; University of Louvain; Brussels Belgium
5. Nuffield Department of Obstetrics and Gynecology; University of Oxford; John Radcliffe Hospital; Oxford UK
6. Fetal Medicine Unit; John Radcliffe Hospital; Oxford UK