1. COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, DK-2200 Copenhagen, Denmark.
2. Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
3. Department of Food Science, Faculty of Science, University of Copenhagen, DK-2100 Copenhagen, Denmark.
4. Explorative Biology, LEO Pharma, DK-2750 Ballerup, Denmark.
5. Institute of Laboratory Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Philipps Universität Marburg, German Center for Lung Research (DZL), 35043 Marburg, Germany.