1 Centre of Excellence for Asthma, COPD & Respiratory Allergy, Franciscus Gasthuis & Vlietland, Rotterdam, the Netherlands.
2 Department of Pulmonary Medicine, Maasstad Hospital, Rotterdam, the Netherlands.
3 Department of Pulmonary Medicine, Bravis Hospital, Bergen op Zoom, the Netherlands.
4 Department of Pulmonary Medicine, Erasmus MC Transplant Institute, Rotterdam, the Netherlands.
5 Revant, Pulmonary Rehabilitation, Breda, the Netherlands.
6 Department of Intensive Care Medicine and Home Mechanical Ventilation, Rotterdam, the Netherlands.
7 Department of National Heart and Lung Institute, Immunomodulation and Tolerance Group, Allergy and Clinical Immunology, Imperial College London, London, UK.
8 Department of Pulmonary Medicine, Rotterdam, the Netherlands.