1 Laboratory of Experimental Medicine and Pediatrics, University of Antwerp, Wilrijk, Belgium; Infla-Med Centre of Excellence, University of Antwerp, Wilrijk, Belgium; Department of Internal Medicine, Ghent University, Ghent, Belgium.
2 Department of Pulmonary Diseases, Radboudumc, Nijmegen, the Netherlands. Electronic address: m.vd.heuvel@me.com.