1. Kleijnen Systematic Reviews Ltd, York, UK
2. Department of Clinical Epidemiology and Medical Technology Assessment, Maastricht University Medical Centre, Maastricht, The Netherlands
3. Health Economics and Decision Science Group, School of Health and Related Research (ScHARR), University of Sheffield, Sheffield, UK
4. Institute of Health Policy and Management, Erasmus University Rotterdam, Rotterdam, The Netherlands
5. School for Public Health and Primary Care (CAPHRI), Maastricht University, Maastricht, The Netherlands