1. Associate Professor, Nursing Department; University of Las Palmas de Gran Canaria; Las Palmas de Gran Canaria; Spain
2. Assistant Professor, Nursing Department; University of Las Palmas de Gran Canaria; Las Palmas de Gran Canaria; Spain
3. Associate Professor, Nursing Department; University of Santiago de Compostela, Santiago de Compostela; Spain
4. Associate Professor, Nursing Department; University of Alcala, Alcalá de Henares; Spain
5. Assistant Professor, Nursing Department; University of Santiago de Compostela, Santiago de Compostela; Spain
6. William Randolph Hearst Foundation Chair in Gerontology; Hunter College of the City University of New York; New York NY USA