1. Department of Haematology; University Hospitals of Leicester; Leicester UK
2. NHS Blood & Transplant; Bristol UK
3. NHS Fetal Anomaly Screening Programme, UK National Screening Committee; University of Exeter; Exeter UK
4. NHS Blood & Transplant; Manchester UK
5. Department of Fetal Medicine, Institute of Cellular Medicine; Newcastle University; Newcastle upon Tyne UK
6. UKNEQAS Blood Transfusion Laboratory Practice; West Hertfordshire Trust; Hertfordshire UK
7. Welsh Blood Service; Pontyclun UK
8. NHS Blood and Transplant; London UK