1. School of Medicine, University of Málaga, Málaga, Spain
2. Unidad de Residencias, Servicio Andaluz de Salud, Junta de Andalucía, Málaga, Spain
3. School of Nursing, University of Cádiz, Cádiz, Spain
4. School of Medicine, University of Cádiz, Plaza Fragela s/n 11003, Cádiz, Spain