1 Centre for Evidence-Based Practice, Belgian Red Cross, Mechelen, Belgium
2 Centre for Evidence-Based Practice, Belgian Red Cross, Mechelen, Belgium; Cochrane Belgium, Centre for Evidence-Based Medicine, Leuven, Belgium
3 Centre for Evidence-Based Practice, Belgian Red Cross, Mechelen, Belgium; Department of Public Health and Primary Care, Faculty of Medicine, KU Leuven, Leuven, Belgium
4 Belgian Red Cross, Mechelen, Belgium; Department of Public Health and Primary Care, Faculty of Medicine, KU Leuven, Leuven, Belgium; Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium