1. Department of Pathology National Maternity Hospital Dublin Ireland
2. Department of Pathology Regional Hospital Mullingar Mullingar Ireland
3. Department of Neonatology National Maternity Hospital Dublin Ireland
4. Department of Obstetrics and Gynaecology National Maternity Hospital Dublin Ireland
5. Merrion Fertility Clinic Dublin Ireland
6. Red Cell Immunohaematology Laboratory, Department of Pathology The Irish Blood Transfusion Service Dublin Ireland