1 Department of Pediatric Pulmonology, Immunology and Intensive Care Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany. Electronic address: valerie.trendelenburg@charite.de.
2 Department of Pediatric Pulmonology, Immunology and Intensive Care Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany; Department of Children and Adolescent Medicine, Division of Pneumology, Allergology and Cystic fibrosis, Goethe University, Frankfurt am Main, Germany.
3 Department of Pediatric Pulmonology, Immunology and Intensive Care Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany.
4 Children's Hospital "Altona," Hamburg, Germany.
5 Department of Pediatrics, Technical University Munich, Munich, Germany.
6 Children's Center Bethel, EvKB, University Bielefeld, Bielefeld, Germany.
7 Department of Pediatric Pneumology, Allergology and Neonatology, Hannover Medical School, Hannover, Germany.
8 Center for Pediatrics, Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany.
9 Department of Pediatrics, University Hospital Carl Gustav Carus, Technical University of Dresden, Dresden, Germany.
10 Paul-Ehrlich-Institut, Division of Allergology, Langen, Germany.
11 Paul-Ehrlich-Institut, Division of Allergology, Langen, Germany; Institut für Produktqualität GmbH, Berlin, Germany.