1. Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
2. Department of Public Health and Primary Care, EPI-Centre, ACHG, Leuven, Belgium
3. Faculty of Medicine and Health Sciences, Biostatistics Unit, Ghent University, Ghent, Belgium
4. Department of Epidemiology and Public Health, Sciensano, Brussels, Belgium
5. Department of General Medicine, Faculty of Medicine, Research Unit of Primary Care and Health, University of Liège, Liège, Belgium
6. Department of Public Health and Primary Care, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
7. Department of Family Medicine and Population Health (FAMPOP) and Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, Antwerp, Belgium
8. Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK