1. University of Valencia, Valencia, Valencia Community, Spain
2. Department of Nursing, University of Seville, Seville, Andalucía, Spain
3. Institute of Biomedicine of Seville, University Hospital Virgen del Rocío/Superior Council of Scientific Investigations (CSIC)/University of Seville, Seville, Andalucía, Spain
4. Cardiology Service, Hospital Infanta Elena, Huelva, Andaluacía, Spain