Affiliation: | a Department of Emergency Medicine, University Hospital, Uppsala, Sweden b Department of Radiology, Lund University, Skåne University Hospital, Malmö, Sweden c Division of Image Processing, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands d Department of Clinical Physiology, Lund University, Skåne University Hospital, Malmö, Sweden e Department of Clinical Sciences/Paediatrics, Lund University, Skåne University Hospital, Malmö, Sweden f Department of Respiratory Medicine, Skåne University Hospital, Malmö, Entrance 35, SE-205 02 Malmö, Sweden |