1. Heart Failure Unit, University of Milano, Italy
2. Department of Physical Therapy, University of Illinois at Chicago, USA
3. Unit of Biostatistics and Clinical Epidemiology, University of Pavia, Italy
4. Policlinic for Preventive and Rehabilitative Sports Medicine, Germany
5. Prevention and Rehabilitation Institute, Technische Universität München, Germany
6. Department of Physical Therapy, University of Miami, USA