1. Heart Failure Unit, Cardiac Department, G Da Saliceto Hospital, Piacenza, Italy;
2. Julius Center for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht, The Netherlands;
3. Sant Pau Institute of Biomedical Research, Research Unit, Sardenya Primary Health Care Centre, Barcelona, Spain;
4. Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK;
5. Cardiology Division, Istituti Clinici Scientifici Maugeri, Centro Medico di Riabilitazione di Veruno, Novara, Italy