1. Department of Pediatric Cardiology; Yuksek Ihtisas Heart-Education and Research Hospital; Ankara Turkey
2. Department of Pediatric Cardiology; Diyarbakir Children Hospital; Diyarbakir Turkey
3. Division of Arrhythmia and Electrophysiology, Department of Cardiology; Yuksek Ihtisas Heart-Education and Research Hospital; Ankara Turkey
4. Department of Pediatric Cardiology; Sadi Konuk Education and Research Hospital; Istanbul Turkey