1. Department of Pulmonary Medicine, Medisch Spectrum Twente, Enschede, the Netherlands
2. Department of Health Technology and Services Research, Faculty of Behavioral, Management and Social sciences, Technical Medical Center, University of Twente, Enschede, the Netherlands
3. Department of Research Methodology, Measurement, and Data-Analysis, Faculty of Behavioral, Management and Social sciences, University of Twente, Enschede, the Netherlands
4. School of Medicine, Flinders University, Adelaide, Australia
5. Department of Respiratory Medicine, Southern Adelaide Local Health Network, Adelaide, Australia