1. Heart Failure Programme, Department of Cardiology; Hospital del Mar; Barcelona Spain
2. Heart Diseases Biomedical Research Group; IMIM (Hospital del Mar Medical Research Institute); Barcelona Spain
3. Analysis on Demand and Activity Division; Catalan Health Service; Barcelona Spain
4. Welch Center for Prevention, Epidemiology and Clinical Research; Johns Hopkins University; Baltimore MD USA
5. Ciccarone Center for the Prevention of Heart Disease, Department of Cardiology; Johns Hopkins Medical Institutions; Baltimore MD USA
6. School of Medicine; Universitat Pompeu Fabra and Universitat Autònoma de Barcelona; Spain
7. Jordi Gol Primary Care Research Institute; Catalan Institute of Heath; Barcelona Spain