1. Department of Cardiology, University Heart Center Zurich, Rämistrasse 100, CH-8091 Zurich, Switzerland
2. Department of Cardiology, Inselspital Bern, University Hospital Bern, Freiburgstrasse 8, CH-3010 Bern, Switzerland
3. Division of Human Genetics, Department of Pediatrics, Inselspital Bern, University Hospital Bern, Freiburgstrasse 8, CH-3010 Bern, Switzerland
4. Department of Cardiology, University Children's Hospital Zurich, Steinwiesstrasse 75, CH-8032 Zürich, Switzerland