1. Centro Hospitalar do Porto – Hospital
Santo Antonio, Department of Orthopaedic
Surgery, Largo Prof. Abel Salazar, 4099-001
Porto, Portugal.
2. Leiden University Medical Center, Department
of Orthopaedic Surgery, Postzone J11-R, PO
Box 9600, 2300 RC Leiden, the
Netherlands.
3. Radboud University Nijmegen Medical Center, Department
of Orthopaedic Surgery, Postzone 357, PO
Box 9101, 6505 HB Nijmegen, the
Netherlands.
4. Centro Traumatologico Ortopedico, Department
of Orthopaedic Oncology and Reconstructive Surgery, AOU-Careggi, Largo
Palagi 1, 50139 Florence, Italy.
5. Nuffield Orthopaedic Centre, Nuffield
Department of Orthopaedics, Rheumatology and Musculoskeletal
Sciences, Oxford University Hospitals, Headington, Oxford
OX3 7LD, UK.