1. Department of Respiratory Medicine and Allergy, University Hospital. The Danish Respiratory Society’s interest group for pleural diseases, Aarhus, Denmark
2. Odense Respiratory Research Unit (ODIN), Department of Clinical Research, University of Southern Denmark, Odense, Denmark
3. Department of Respiratory Medicine, Odense University Hospital, Odense, Denmark
4. Oxford Respiratory Trials Unit, Churchill Hospital, University of Oxford, Oxford, UK
5. Respiratory Research Unit PLUZ, Department of Respiratory Medicine, Zealand University Hospital Roskilde & Næstved, Zealand, Denmark
6. Institute of Regional Health Reseach, University of Southern Denmark, Odense, Denmark