1. University of Zurich, Zurich, Switzerland
2. Department of Cardiovascular Surgery, University Hospital of Zurich, Zurich, Switzerland
3. Department of Biostatistics at Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
4. Department of Pediatric Cardiology, University Children’s Hospital, Zurich, Switzerland
5. Department of Cardiovascular Surgery, University Children’s Hospital, Zurich, Switzerland
6. Department of Cardiovascular Surgery, University Hospital Lausanne, Lausanne, Switzerland
7. Department of Surgery for Congenital Heart Defects, Pediatric Heart Center Duisburg, University of Düsseldorf, Duisburg, Germany