1. Department of Orthopaedics and Trauma Villalba General Hospital Madrid Spain
2. Departamento de Bioingeniería e Ingeniería Aeroespacial Universidad Carlos III de Madrid Madrid Spain
3. Instituto de Investigación Sanitaria Gregorio Marañón Madrid Spain
4. Department of Orthopaedics and Trauma Fundación Jiménez Díaz Hospital Madrid Spain
5. Department of Orthopaedics and Trauma Gregorio Marañón General Hospital Madrid Spain
6. Surgery Department, Faculty of Medicine Complutense University of Madrid Madrid Spain