1. Clinic for Cardiology, University Clinical Center Serbia University of Belgrade Belgrade Serbia
2. Department of Physical Therapy, College of Applied Science University at Illinois Chicago Illinois USA
3. Cardiovascular Research Centre, Institute of Cellular Medicine, Medical School, Newcastle University & Newcastle upon Tyne Hospitals NHS Foundation Trust Newcastle upon Tyne UK
4. Heart Failure Unit and Cardiopulmonary Laboratory, University Cardiology Department, I.R.C.C.S Policlinico San Donato University Hospital Milan Italy