1. Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Odense, Denmark
2. Department of Respiratory Medicine, Næstved Hospital, Næstved, Denmark
3. Allergi og Lungeklinikken Helsingør, Helsingør, Denmark
4. Department of Medicine, Zealand University Hospital, Roskilde, Denmark
5. Department of Respiratory Medicine, Bispebjerg Hospital, Copenhagen, Denmark
6. Department of Respiratory Medicine, Odense University Hospital, Odense, Denmark
7. The Danish Medicines Council Secretariat, Copenhagen, Denmark
8. COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark