1. Centre for Environment and Health, Department of Public Health and Primary Care, University of Leuven, Leuven, Belgium.
2. Laboratory of Respiratory Diseases and Thoracic Surgery, Department of Chronic Diseases and Metabolism, University of Leuven, Leuven, Belgium.
3. Department of Microbiology, Immunology and Transplantation, Allergy and Clinical Immunology Research Group, University of Leuven, Leuven, Belgium.
4. Department of Imaging and Pathology, University of Leuven, Leuven, Belgium.
5. Laboratory for Translational Research in Obstructive Pulmonary Diseases, Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium.
6. Department of Imaging and Pathology, Biomedical MRI, University of Leuven, Leuven, Belgium.