1. Department of Radiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
2. Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
3. Department of Radiology, Medisch Spectrum Twente, Enschede, The Netherlands
4. Department of Pulmonology, Medisch Spectrum Twente, Enschede, The Netherlands
5. Department of Pulmonology, University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD, Groningen, The Netherlands
6. Institute for Diagnostic Accuracy Research B.V., Groningen, The Netherlands
7. University of Groningen, Groningen, The Netherlands