1. Division of Respiratory MedicineUniversity of NottinghamQueen's Medical CentreNottinghamUK
2. Department of EpidemiologyUniversity Medical Center GroningenGroningenThe Netherlands
3. Department of PulmonologyUniversity Medical Center GroningenGroningenThe Netherlands
4. Cologne Center for GenomicsUniversity of CologneCologneGermany
5. National Heart and Lung InstituteImperial College LondonLondonUK
6. Institute for Lung Health, Immunity, and InflammationUniversity of LeicesterLeicesterUK
7. University of SheffieldSheffieldUK
8. Freemasons Department of Geriatric MedicineUniversity of AucklandAucklandNew Zealand
9. Department of Paediatric Pulmonology and Paediatric AllergologyBeatrix Children's HospitalGroningen Research Institute for Asthma and COPD (GRIAC)University of GroningenUniversity Medical Center GroningenGroningenThe Netherlands