1 Department Pulmonary Function, Franciscus Gasthuis & Vlietland, Rotterdam, The Netherlands.
2 Department Pulmonology, Franciscus Gasthuis & Vlietland, Rotterdam, The Netherlands.
3 Department of National Heart and Lung Institute, Immunomodulation and Tolerance Group, Allergy and Clinical Immunology, Imperial College London, London, United Kingdom.
4 Department Pulmonology, Erasmus MC, Rotterdam, The Netherlands.