1. Obstetrics and Gynaecology, UCD Perinatal Research Centre, School of Medicine, University College Dublin, National Maternity Hospital, Dublin, Ireland;
2. Royal Belfast Hospital for Sick Children, Belfast Health & Social Care Trust, Belfast, United Kingdom;
3. CSTAR, School of Public Health, Physiotherapy and Population Science, University College Dublin, Dublin, Ireland;
4. Department of Fetal Medicine, Royal Jubilee Maternity Hospital, Belfast, United Kingdom;
5. Centre for Experimental Medicine, Queen’s University Belfast, Belfast, United Kingdom