1. Paediatric Emergency Department, Royal Manchester Children’s Hospital, Central Manchester University Hospitals NHS Foundation Trust, Manchester, UK;
2. Manchester Academic Health Sciences Centre, Central Manchester University Hospitals NHS Foundation Trust, The University of Manchester, Manchester, UK;
3. Department of Physical Engineering, Sellafield Ltd, Seascale, UK;
4. National Poisons Information Service Edinburgh, Royal Infirmary of Edinburgh, Edinburgh, UK;
5. Department of Paediatric Respiratory Medicine, Royal Manchester Children’s Hospital, Central Manchester University Hospitals NHS Foundation Trust, Manchester, UK