1. Department of Orthopaedic Surgery and Traumatology, Ghent University Hospital, Ghent, Belgium
2. Laboratory of Connective Tissue Biology, Department of Rheumatology, Ghent University Hospital, Ghent, Belgium
3. Ortopediay Tramatologia, Instituto Nacional de Rehabilitación, Mexico City, Mexico
4. Department of Orthopaedic Surgery, Stedelijk Ziekenhuis Roeselare, Roeselare, Belgium