1. Lund University, Department
of Orthopaedics, Clinical Sciences, Lund, Sweden.
2. Department of Orthopaedic Surgery and
Traumatology, Hospital La Paz-IdiPAZ, Universidad
Autónoma de Madrid, Madrid, Spain.
3. Charit–Universit¤tsmedizin, Germany.
4. University of Ulm, Orthopaedic and
Rehabilitation Hospital Emeritus Status, Ulm, Germany.
5. Botnar Institute of Musculoskeletal Sciences, Old Road, Oxford
OX3 7LD, UK.