1. Centre for Evidence-Based Practice; Belgian Red Cross; Mechelen Belgium
2. Department of Public Health and Primary Care; Faculty of Medicine; KU Leuven; Leuven Belgium
3. Department of Microbiology and Immunology; Faculty of Medicine; KU Leuven; Leuven Belgium
4. Belgian Red Cross; Mechelen Belgium
5. Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
6. Department of Pediatrics; University Hospitals Leuven; Leuven Belgium
7. Department of Development and Regeneration; Faculty of Medicine; KU Leuven; Leuven Belgium