Corresponding Author

Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK

Fetal Medicine Unit, Department of Obstetrics and Gynaecology, St. George's University Hospitals NHS Foundation Trust, London, UK

Twins Trust Centre for Research and Clinical Excellence, St. George's University Hospitals NHS Foundation Trust, London, UK

Correspondence

Asma Khalil, Fetal Medicine Unit, Department of Obstetrics and Gynaecology, St. George's University Hospitals, NHS Foundation Trust, Blackshaw Road, London SW17 0QT, UK.

Email: akhalil@sgul.ac.uk