1. Department of Cardiovascular Surgery, University Heart Center Freiburg, Bad Krozingen, Germany
2. Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
3. Department of Congenital Heart Disease and Pediatric Cardiology, University Heart Center Freiburg, Bad Krozingen, Germany
4. National Registry for Congenital Heart Defects, Berlin, Germany