1. Brisbane Orthopedics and Sports Medicine Center, Brisbane, Australia.
2. St. Vincent's Clinic, Darlinghurst, Australia.
3. Global Research Solutions, Inc., Burlington, Ontario, Canada.
4. Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada.
5. Division of Orthopedic Surgery, Centre for Evidence-Based Orthopedics, Department of Surgery, McMaster University, Hamilton, Ontario, Canada.