1. Division of Congenital Cardiovascular Surgery, University Children’s Hospital Zurich, Zurich, Switzerland
2. Department of Cardiac Surgery, University Heart Center, University Hospital Zurich, Zurich, Switzerland
3. Division of Paediatric Cardiology, University Children’s Hospital Zurich, Zurich, Switzerland
4. Department of Cardiac Surgery, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
5. Clinique des Grangettes, Geneva, Switzerland