1. Guy's and St Thomas' NHS Foundation Trust; Paediatric A&E Department; Lambeth Palace Road London UK SE1 7EH
2. Clinical Trials Unit; Medical Research Unit; Other Diseases Group 222 Euston Road London UK NW1 2DA
3. Newcastle upon Tyne NHS Trust; Paediatrics; 3 rd Floor, Doctors Residence, Royal Victoria Infirmary Queen Victoria Road Newcastle upon Tyne Tyne and Wear UK NE1 4LP