1. Department of Rheumatology, Zuyderland Medical Center, Heerlen-Sittard, the Netherlands
2. Department of Pulmonary Medicine, Zuyderland Medical Center, Heerlen-Sittard, the Netherlands
3. Department of Pulmonary Medicine, Zuyderland Medical Center, Heerlen-Sittard, the Netherlands; Department of Intensive Care Medicine, Zuyderland Medical Center, Heerlen-Sittard, the Netherlands
4. Department of Cardiology, Zuyderland Medical Center, Heerlen-Sittard, the Netherlands
5. Department of Pulmonary Medicine, Erasmus Medical Center, Rotterdam, the Netherlands