Affiliation: | aInstitute of Clinical Sciences, Department of Physical and Rehabilitation Medicine, University of Oulu, Box 5000, Oulu 90014, Finland;bDepartment of Orthopaedic Surgery, University of Virginia, 400 Ray C. Hunt Drive, Suite 330, Charlottesville, VA 22908, USA;cDepartment of Orthopaedics and Traumatology, Division of Spine Surgery, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Professorial Block, 5th Floor, 102 Pokfulam Road, Pokfulam, Hong Kong SAR, China;dDepartment of Orthopaedic Surgery, Rush University Medical Center, 1611 West Harrison Street, Chicago, IL 60612, USA |