Dr Hull is a Consultant in Paediatric Respiratory Medicine at the Children's Hospital in Oxford. He trained in several different centres in the UK and in Melbourne. He has interests in genetics and respiratory syncytial virus infection. Dr Forton is a Consultant in Paediatric Respiratory Medicine based at the Children's Hospital for Wales in Cardiff, UK. His research interest is in the genetics of susceptibility to infection and in microbioligical surveillance of the lung. Dr Thomson is a Consultant in Paediatric Respiratory Medicine at the Children's Hospital in Oxford. She is the director of the Cystic Fibrosis Centre and has interests in the management of respiratory infections including pneumonia and empyema