1. Department of Biochemical Research, Institute of Sanitary Research Fundación Jiménez Díaz, Madrid, Spain;
2. Spinal Pathology Unit, Institute of Sanitary Research Fundación Jiménez Díaz, Spinal Pathology Unit, Madrid, Spain;
3. Department of Internal Medicine, Institute of Sanitary Research Fundación Jiménez Díaz, Madrid, Spain;
4. Institute of Sanitary Research Fundación Jiménez Díaz, Pathological Anatomy, Madrid, Spain;
5. Technology based Firm Technological Park of Galicia, Ourense, Spain;
6. Department of Traumatology and Orthopedic Surgery, University Hospital of Santiago de Compostela, Santiago de Compostela, Spain