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