1. Cardiovascular and Respiratory Physiology, TechMed Centre, University of Twente, Enschede, The Netherlands
2. Department of Intensive Care, University Medical Center Utrecht, Utrecht, The Netherlands
3. Department of Pulmonary Diseases/Home Mechanical Ventilation, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
4. Groningen Research Institute of Asthma and COPD (GRIAC), University of Groningen, Groningen, The Netherlands