1. McMaster University; School of Rehabilitation Science; 1200 Main Street West Hamilton Ontario Canada
2. McMaster University; School of Rehabilitation Science & Department of Clinical Epidemiology and Biostatistics; 1400 Main Street West Hamilton Ontario Canada L8S 1C7
3. Simon Fraser University; Faculty of Health Sciences; Blossom Hall, Room 9510 8888 University Drive Burnaby BC Canada V5A 1S6
4. The University of Hull; The Institute of Rehabilitation; 215 Anlaby Road Hull UK HU32PG
5. McMaster University; Department of Clinical Epidemiology and Biostatistics; 1200 Main Street West HSC 3H54 Hamilton Ontario Canada L8N 3Z5
6. Canadian Memorial Chiropractic College; Department of Clinical Education; 6100 Leslie Street Toronto ON Canada M2H 3J1
7. Merck Research Laboratories; Department of Clinical Development; RY34-B272 126 E. Lincoln Ave Rahway NJ USA 07065