1. General Directorate of Care, Humanization and Socio-Health Care, 33005 Oviedo, Asturias, Spain
2. Health Research Institute of the Principality of Asturias (ISPA), 33006 Oviedo, Asturias, Spain
3. Foundation for the Promotion in Asturias of Applied Scientific Research and Technology (FICYT), 33007 Oviedo, Asturias, Spain
4. Consult Europa Projects and Innovation, 35006 Las Palmas de Gran Canaria, Las Palmas, Spain
5. Institute for Hospitalization and Assistance Services for the Elderly (ISRAA), 31100 Treviso, Veneto, Italy
6. Department of Preventive Medicine and Public Health, School of Medicine and Health Sciences, University of Oviedo 33003 Oviedo, Asturias, Spain