1. UCD Obstetrics and Gynaecology, School of Medicine and Medical Science, University College Dublin, National Maternity Hospital, Dublin, Ireland;
2. UCD Institute of Food and Health, School of Agriculture and Food Science, University College Dublin, Dublin, Ireland;
3. Department of Midwifery, National Maternity Hospital, Dublin, Ireland;
4. Department of Clinical Chemistry, St. Vincent’s University Hospital, Dublin, Ireland