1. Department of Anaesthesiology and Pain Medicine; Maastricht University Medical Centre; Maastricht The Netherlands
2. Department of Orthopaedic Surgery; Maastricht University Medical Centre; Maastricht The Netherlands
3. The Joanna Briggs Institute; The University of Adelaide; Adelaide SA Australia
4. School for Public Health and Primary Care; Maastricht University; Maastricht The Netherlands
5. Kleijnen Systematic Reviews Ltd; York UK
6. Department of Clinical Epidemiology and Medical Technology; Maastricht University Medical Centre; Maastricht The Netherlands