1. Department of Allergy and Respiratory Medicine; Near East University Hospital; Lefcosia; Turkey
2. Department of Preventive & Social Medicine; Dunedin School of Medicine; University of Otago; Dunedin; New Zealand
3. Firestone Institute for Respiratory Health; St. Joseph's Healthcare and McMaster University; Hamilton; ON; Canada
4. Department of Cardiology; Odense University Hospital; Odense; Denmark
5. Department of Allergy and Respiratory Medicine; Odense University Hospital; Odense; Denmark
6. Department of Clinical Biochemistry and Pharmacology; Odense University Hospital; Odense; Denmark