1. Private Practice, Madrid, Spain
2. Department of Orthopedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
3. Harvard Medical School, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
4. Department of Orthopaedics and Traumatology, Medical University Innsbruck, Innsbruck, Austria
5. Department of Orthopaedic Surgery, International University of Health and Welfare, Tokyo, Japan
6. Department of Orthopaedic Surgery, Flinders University, Adelaide, Australia