1. York University; Department of Psychology; 209 Behavioural Sciences Building 4700 Keele Street Toronto ON Canada M3J 1P3
2. Institute for Work & Health; 481 University Avenue, Suite 800 Toronto ON Canada M5G 2E9
3. McMaster University; Department of Anesthesiology; 1280 Main Street West Hamilton ON Canada L8S 4K1
4. Erasmus Medical Center; Department of General Practice; PO Box 2040 Rotterdam Netherlands 3000 CA
5. National Institute for Health and Welfare (THL); Centre for Health and Social Economics (CHESS); PO Box 30 Mannerheimintie 166 Helsinki Finland FI-00271
6. VU University Amsterdam; Department of Health Sciences, Faculty of Earth and Life Sciences; PO Box 7057 Room U454 Amsterdam Netherlands 1007 MB
7. The George Institute for Global Health; Musculoskeletal Division; PO Box M201 Missenden Road, Camperdown Sydney NSW Australia 2050