1 Copenhagen Prospective Studies on Asthma in Childhood, Faculty of Health and Medical Sciences, University of Copenhagen and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark; Department of Systems Biology, Center for Biological Sequence Analysis, Technical University of Denmark, Kgs. Lyngby, Denmark.
2 Department of Systems Biology, Center for Biological Sequence Analysis, Technical University of Denmark, Kgs. Lyngby, Denmark.
3 Copenhagen Prospective Studies on Asthma in Childhood, Faculty of Health and Medical Sciences, University of Copenhagen and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark; Spectroscopy and Chemometrics, Department of Food Science, University of Copenhagen, Copenhagen, Denmark.
4 Copenhagen Prospective Studies on Asthma in Childhood, Faculty of Health and Medical Sciences, University of Copenhagen and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark.
5 Copenhagen Prospective Studies on Asthma in Childhood, Faculty of Health and Medical Sciences, University of Copenhagen and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark. Electronic address: bisgaard@copsac.com.