1 Dept of Clinical Pharmacy and Pharmacology, Groningen Research Institute for Asthma and COPD (GRIAC), University Medical Center Groningen, University of Groningen, Groningen, The Netherlands [email protected].
2 Medication Adherence Expertise Center of the northern Netherlands (MAECON), Groningen, The Netherlands.
3 Dept of Clinical Pharmacy and Pharmacology, Groningen Research Institute for Asthma and COPD (GRIAC), University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
4 Imperial College London and Royal Brompton Hospital, London, UK.