[1] Univ Gothenburg, Inst Med, Dept Internal Med & Clin Nutr, Krefting Res Ctr, Gothenburg, Sweden
[2] Seinajoki Cent Hosp, Dept Resp Med, Seinajoki, Finland
[3] Tampere Univ, Fac Med & Hlth Technol, Tampere, Finland
[4] Turku Univ Hosp, Pulm Dis & Clin Allergol, Turku, Finland
[5] Univ Turku, Dept Pulm Dis & Clin Allergol, Turku, Finland
[6] GlaxoSmithKline Oy, Espoo, Finland
[7] MedEngine Oy, Helsinki, Finland
[8] Tampere Univ Hosp, Allergy Ctr, Tampere, Finland