1 Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, the Netherlands. [email protected].
2 Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, the Netherlands.
3 Department of General Practice & Elderly Care Groningen Research Institute for Asthma and COPD (GRIAC), University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
4 Unit of Global Health, Department of Health Sciences, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
5 Department of Medicine and Makerere Lung Institute, Makerere University, Kampala, Uganda.