1. Critical Care Department; Parc Taulí. Hospital Universitari; Sabadell Spain
2. Primary Care Service, Vallès Occidental; Sabadell Spain
3. Critical Care Department; Hospital Universitari Mútua de Terrassa; Terrassa Spain
4. Department of Results Centers; Fundació Parc Taulí, Unit of Clinical Trials; Sabadell Spain
5. Fundamental and Medical-Surgical Nursing Department, School of Nursing; University of Barcelona; Barcelona Spain