Affiliation: | 1. Cytogenetics Department, GSTS Pathology, Guy's and St Thomas' NHS Foundation Trust, London, UK;2. North East Thames Regional Cytogenetics Laboratory, Great Ormond Street Hospital for Children NHS Trust, London, UK;3. Regional Cytogenetics Laboratory, North West London Hospitals NHS Trust, London, UK;4. Regional Cytogenetics Unit, St George's Hospital Medical School, London, UK;5. Cytogenetics Department, Guy's and St Thomas' NHS Foundation Trust, London, UK |