1. Rehabilitation and Traumatology Service, Virgen de las Nieves University Hospital of Granada, Granada, Spain;
2. Department of Physiotherapy, University of Granada, Granada, Spain;
3. Department of Preventive Medicine and Public Health, University of Granada, Granada, Spain;
4. Physical Medicine and Rehabilitation Research – Copenhagen (PMR-C), Copenhagen, Denmark;
5. Departments of Physiotherapy and Orthopaedic Surgery, Copenhagen University Hospital, Hvidovre, Copenhagen, Denmark;
6. CIBER of Epidemiology and Public Health, CIBEResp, Granada, Spain;
7. Institute for biomedical research of Granada (ibs. GRANADA), Servicio Andaluz de Salud/University of Granada, Granada, Spain