1 Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, The Netherlands. evelynbrakema@gmail.com.
2 Groningen Research Institute for Asthma and COPD (GRIAC) & Department of General Practice & Elderly Care Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands. frgemert@xs4all.nl.
3 Makerere University Lung Institute (MLI), Mulago Hospital, Kampala, Uganda. frgemert@xs4all.nl.
4 International Primary Care Respiratory Group (IPCRG), London, UK.
5 Pulmonary Department, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.
6 Center of Training Family Medicine, University of Medicine and Pharmacy, Ho Chi Minh City, Vietnam.
7 Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, The Netherlands.
8 Groningen Research Institute for Asthma and COPD (GRIAC) & Department of General Practice & Elderly Care Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.