1. Department of Cardiology, Ataturk Education and Research Hospital, Bilkent, 06800 Ankara, Turkey
2. Department of Cardiology, Gazi Mustafa Kemal State Hospital, Gazi Mahallesi, 06500 Yenimahalle, Turkey
3. Department of Cardiology, Gazi University Medical Faculty, Besevler, 06500 Ankara, Turkey