1. Department of Respiratory Medicine, Lung Transplant Unit, University Hospitals Leuven, Leuven, Belgium and Department of Chronic Diseases, Metabolism & Ageing (CHROMETA), Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), KU Leuven, Herestraat 49, Leuven, B-3000, Belgium
2. Department of Public Health and Primary Care, Academic Centre for Nursing and Midwifery, KU Leuven, Leuven, Belgium
3. Department of Thoracic Surgery, University Hospitals Leuven, Leuven, Belgium and Department of Chronic Diseases, Metabolism & Ageing (CHROMETA), Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), KU Leuven, Leuven, Belgium
4. Department of Respiratory Medicine, Lung Transplant Unit, University Hospitals Leuven, Leuven, Belgium and Department of Chronic Diseases, Metabolism & Ageing (CHROMETA), Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), KU Leuven, Leuven, Belgium