1. Department of Educational Sciences, Faculty of Social Sciences, Utrecht University, Hilversum, The Netherlands
2. Department of Pulmonary Diseases, University Hospital Dijkzigt, Erasmus University Rotterdam, Hilversum, The Netherlands
3. Department of Methods and Statistics, Faculty of Social Sciences, Erasmus University Rotterdam, Hilversum, The Netherlands
4. Department of Health Psychology, Faculty of Social Sciences, Utrecht University, Hilversum, The Netherlands
5. Heideheuvel Asthma Centre, Hilversum, The Netherlands