1 Department of Physical Therapy, University of Delaware, Newark, Delaware, USA kgs@udel.edu.
2 University of Delaware, Newark, Delaware, USA.
3 Physiotherapy, University of Queensland, Brisbane, Queensland, Australia.
4 Department of Clinical Medicine, Aalborg University, Research Unit for General Practice in Aalborg, Aalborg, Denmark.
5 Sports Orthopaedic Research Center-Copenhagen (SORC-C), Arthroscopic Center, Department of Orthopedic Surgery, Copenhagen University Hospital, Amager-Hvidovre, Denmark, Amager-Hvidovre Hospital, Hvidovre, Denmark.