1. Department of Nursing and Stomatology University Rey Juan Carlos Alcorcón Madrid Spain
2. Príncipe de Asturias University Hospital (Hospital Universitario Príncipe de Asturias) Alcalá de Henares Madrid Spain
3. University of Alcalá de Henares Madrid Spain
4. Department of Biochemistry and Molecular Biomedicine University of Barcelona Barcelona Spain
5. Faculty of Nursing, Physiotherapy and Podiatry, University Complutense of Madrid Madrid Spain