Affiliation: | 1.Department of Pulmonary Diseases,University of Groningen, University Medical Center Groningen,Groningen,The Netherlands;2.Groningen Research Institute for Asthma and COPD,University of Groningen, University Medical Center Groningen,Groningen,The Netherlands;3.Department of Epidemiology,University of Groningen, University Medical Center Groningen,Groningen,The Netherlands;4.Department of Pulmonary Diseases,Martini Hospital Groningen,Groningen,The Netherlands;5.Department of Pharmaceutical Technology and Biopharmacy,University of Groningen,Groningen,The Netherlands |