1. Cytogenetics, Guy’s & St Thomas’ NHS Foundation Trust, London, UK
2. Cytogenetics, GSTS Pathology, London, UK
3. Clinical Genetics, Guy’s & St Thomas’ NHS Foundation Trust, London, UK
4. Fetal Medicine Unit, Guy’s & St Thomas’ NHS Foundation Trust, London, UK
5. Fetal Medicine Unit, Medway Maritime Hospital, Kent, UK
6. King’s College, London, UK