1. Division of Neonatology, Department of Paediatrics, University Maternity Hospital Limerick (UMHL), Limerick, Ireland;
2. Department of Clinical Microbiology, University Hospital Limerick (UHL), Limerick, Ireland;
3. Research Department, Rotunda Hospital, Dublin, Ireland;
4. Graduate Entry Medical School (GEMS), University of Limerick, Limerick, Ireland