1 Barnet Hospital, Royal Free London NHS Foundation Trust, Barnet, UK.
2 Whittington Hospital, Whittington Foundation NHS Foundation Trust, London, UK.
3 Paediatric Psychology, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK.
4 Department of Paediatric Anaesthetics, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK; Center for the Developing Brain, School of Biomedical Engineering and Imaging Sciences, King's College London, St. Thomas' Hospital, London, UK. Electronic address: benjamin.blaise@nhs.net.