1 University of Helsinki and Helsinki University Hospital, Respiratory Diseases and Allergology, Skin and Allergy Hospital, FI-00029 Helsinki, Finland.
2 Association of the Finnish Pharmacies, FI-00120 Helsinki, Finland.
3 University of Helsinki and Helsinki University Hospital, Respiratory Diseases and Allergology, Meilahti Triangle Hospital, Pulmonary Diseases, FI-00029 Helsinki, Finland.