1. Department of Clinical Pharmacy & Pharmacology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
2. Groningen Research Institute for Asthma and COPD (GRIAC), Groningen, The Netherlands
3. Department of Primary and Long-term Care, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
4. Department of General Practice, Research Institute CAPHRI, Maastricht University, Maastricht, The Netherlands
5. Department of Pulmonary Diseases and Tuberculosis, University of Groningen University Medical Center Groningen, Groningen, The Netherlands