1. UCL Institute of Child Health & Great Ormond Street Hospital, London WC1N 1EH, United Kingdom.
2. St. John's Institute of Dermatology, King's College London (Guy's Campus), London SE1 9RT, United Kingdom.
3. Plastic Surgery Unit, Guy's and St. Thomas' National Health Service Foundation Trust, London SE1 7EH, United Kingdom.
4. Rayne Cell Therapy Suite, Department of Haematological Medicine, King's College London, London SE5 9NU, United Kingdom.