1. Faculty of Nursing, Physiotherapy and Podiatry, Universidad Complutense de Madrid, 28040 Madrid, Spain
2. Instituto de Investigación Sanitaria Hospital Clínico San Carlos (IdISSC), 28040 Madrid, Spain
3. Research Unit of Clínica CEMTRO, 28035 Madrid, Spain
4. Department Nursing and Podiatry, University of Malaga, 29016 Málaga, Spain
5. Instituto de Investigación Sanitaria imas12, Grupo Invecuid, 28041 Madrid, Spain