[1] Univ Liverpool, Liverpool Ctr Cardiovasc Sci, Liverpool, Merseyside, England
[2] Liverpool Heart & Chest Hosp, Liverpool, Merseyside, England
[3] Med Univ Silesia, Silesian Ctr Heart Dis, Dept Cardiol Congenital Heart Dis & Electrotherap, Zabrze, Poland
[4] Univ Clin Ctr Kragujevac, Cardiol Clin, Kragujevac, Serbia
[5] Clin Ctr Sestre Milosrdnice, Zagreb, Croatia
[6] Clin Ctr Serbia, Cardiol Clin, Visegradska 26, Belgrade 11000, Serbia
[7] Univ Hosp Ctr Mother Theresa, Clin Cardiol, Tirana, Albania
[8] Univ Podgorica, Univ Clin Ctr Montenegro, Med Fac, Cardiol Clin, Podgorica, Montenegro
[9] Natl Heart Hosp, Coronary Care Unit, Sofia, Bulgaria
[10] Colentina Univ Hosp, Cardiol Dept, Bucharest, Romania
[11] Univ Clin Ctr Tuzla, Med Fac, Cardiol Dept, Clin Internal Med, Tuzla, Bosnia & Herceg
[12] Med Univ Carol Davila, Colentina Univ Hosp, Bucharest, Romania
[13] Univ Belgrade, Sch Med, Belgrade, Serbia
[14] Aalborg Univ, Dept Clin Med, Aalborg Thrombosis Res Unit, Aalborg, Denmark