[1] Belgrade University,School of Medicine
[2] Clinical Centre of Serbia,Cardiology Clinic
[3] National Heart Hospital,Medicine University “Carol Davila”
[4] Colentina University Hospital,Clinic of Cardiology
[5] University Hospital Centre Mother Theresa,Cardiology Department
[6] Clinic for Internal Diseases,Cardiology Department
[7] Clinical Hospital Centre Sestre Milosrdnice,University of Birmingham Centre for Cardiovascular Sciences
[8] University Clinical Centre Podgorica,undefined
[9] Regional Hospital,undefined
[10] General Hospital Zenica,undefined
[11] Emergency Hospital,undefined
[12] Insitute for Cardiovascular Diseases ‘Prof Dr George I.M. Georgescu’,undefined
[13] Health Centre Vidin,undefined
[14] Clinical Hospital Centre Rijeka,undefined
[15] Clinical Centre Kragujevac,undefined
[16] City Hospital,undefined