1. Department of Pathology and Medical Biology,
2. Groningen Research Institute for Asthma and COPD, and
3. W.J. Kolff Institute for Biomedical Engineering and Materials Science, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands;
4. Department of Medicine, University of Vermont, Burlington, Vermont;
5. Lung Biology Unit, Department of Experimental Medical Science, Lund University, Lund, Sweden;
6. National Heart and Lung Institute, Imperial College London, London, United Kingdom; and
7. Centre for Pediatrics and Child Health, Imperial College and Royal Brompton Hospital, London, United Kingdom