1. Department of Mechanical Science and Engineering; University of Illinois at Urbana-Champaign; Urbana IL USA
2. Orthopaedic Research Laboratory; Department of Orthopaedic Surgery and Traumatology; Odense University Hospital; Institute of Clinical Research; University of Southern Denmark; Denmark
3. Department of Biomedicine; Aarhus University; Aarhus Denmark
4. Department of Rheumatology; Aarhus University Hospital; and Department of Clinical Medicine; Aarhus University Hospital; Aarhus Denmark
5. Department of Plastic Surgery; Aarhus University Hospital; Aarhus Denmark
6. Department of Clinical Cell Biology (KCB); Vejle Hospital-Lillebaelt Hospital; Institute of Regional Health Research; University of Southern Denmark; Vejle Denmark
7. Beckman Institute of Advanced Science and Technology; University of Illinois at Urbana-Champaign; Urbana IL USA