1. Department of Cardiology, Istanbul Sultan II Abdülhamid Han Training and Research Hospital, Istanbul, Turkey
2. Department of Cardiology, Van Training and Research Hospital, Van, Turkey
3. Department of Cardiology, Siyami Ersek Training and Research Hospital, Istanbul, Turkey
4. Department of Cardiology, Hisar Intercontinental Hospital, Istanbul, Turkey
5. Department of Cardiology, Nisantası University, Istanbul, Turkey
6. Department of Biostatistics, Atatürk University, Erzurum, Turkey