1. Division of Paediatric Infections Disease, Royal Aberdeen Children's Hospital, Aberdeen, UK
2. Division of Paediatric Haemato-Oncology, Royal Aberdeen Children's Hospital, Aberdeen, UK
3. Department of Radiology, Aberdeen Royal Infirmary, Aberdeen, UK
4. Division of Paediatric Infectious Disease, Royal Aberdeen Children's Hospital, Aberdeen, UK
5. Institute of Medical Sciences, University of Aberdeen, Aberdeen, UK