[1] CAPHRI School for Public Health and Primary Care,Department of Family Medicine, Maastricht University
[2] Sint Franciscus Gasthuis,Department of Pulmonology
[3] Leiden University Medical Centre,Department of Public Health and Primary Care
[4] University Medical Centre Groningen,Department of Primary Care, University of Groningen
[5] University Medical Centre,Groningen Research Institute for Asthma and COPD (GRIAC)
[6] Institute for Health Policy and Management/Institute for Medical Technology Assessment,Erasmus University Rotterdam
[7] University Medical Centre Groningen,Department of Pulmonary Diseases, University of Groningen
[8] PICASSO foundation for COPD,Huisartsenzorg IJsselstein
[9] locatie ’t Steyn,Department of Pulmonary Diseases
[10] Lung Foundation Netherlands,Department of Methodology & Statistics, Maastricht University
[11] University Medical Centre Nijmegen,undefined
[12] CAPHRI School for Public Health and Primary Care,undefined