1. Embryonic Stem Cell Laboratories, Guy's Assisted Conception Unit, Division of Women's Health, King's College School of Medicine, London, UK
2. Clinical Transplantation Laboratory, GSTS Pathology, Guy's Hospital, London, UK
3. Guy's and St. Thomas' Centre for Preimplantation Genetic Diagnosis and Genetics Centre, Guy's and St. Thomas' NHS Foundation Trust, London, UK
4. MRC Centre for Transplantation, King's College London, King's Heath Partners, London, UK