Yesilcimen, Kemal Yetkin, Ertan, Ortadoğu Hospital, Mersin, Turkey Yetkin, Ertan Yeung, Chun-Yip, The University of Hong Kong Yi, Lei Yildiray-Sahin, Durmus Yıldırım, A. Osman, Gulhane Medical Faculty, Dept. of Cardiology, Ankara, Turkey Yildirim, A. Osman, Gülhane Military Medical Faculty, Dept.of Cardiology Yildirim, Ali, Eskisehir Osmangazi University, Medical Faculty, Department of Pediatric Cardiology, Eskisehir, Turkey Yildirim, Ali Osman, Department of Cardiology, Gulhane Medical Faculty Yildirim, Aslihan Mete, Kecioren Teaching and Research Hospital Yildirim, Aydin, Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Training and Research Hospital Yıldırım, Aydın, Department of Cardiology, Istanbul Mehmet Akif Er soy Thoracic and Car diovascular Surgery Training and Research Hospital Istanbul Yildirim, Aydin, Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Training and Research Hospital, Department of Cardiology, Istanbul Yildirim, Aytul Belgi, Akdeniz University, School of Medicine, Department of Cardiology, Antalya, Turkey Yildirim, Erkan, Gulhane Research and Training Hospital, Ankara Yildirim, Mustafa Yildirim, Naciye Demirel Yildirim, Selman Vefa Yıldız, Abdulkadir, Dicle University Faculty of Medicine, Department of Cardiology, Diyarbakır Yildiz, Abdulkadir, Department of Cardiology, Turkiye Yuksek Ihtisas Hospital, Ankara, Turkey Yildiz, Abdulkadir, Department of Cardiology, Dicle University School of Medicine Diyarbakir (Türkiye) Yildiz, Ali Yıldız, Banu Şahin, Kartal Lutfi Kırdar Education and Research Hospital Yildiz, Banu Sahin