1. Institute of Orthopaedic Research and BiomechanicsUniversity Medical Center UlmUlm Germany
2. Department of Orthopaedic SurgeryUniversity of Michigan Medical SchoolAnn Arbor Michigan
3. Department of TraumaUniversity Hospital ZurichZurich Switzerland
4. Department of Orthopaedic TraumaUniversity Hospital RWTH AachenAachen Germany
5. Department of Experimental Trauma Surgery, Klinikum Rechts der IsarTechnical University of MunichMunich Germany
6. Alliance for Regenerative MedicineWashington District of Columbia