1. Cardiovascular Centre Zurich, Klinik Im Park, Zurich, Switzerland
2. University Heart Centre, Division of Cardiology, University Hospital Zurich, Zurich, Switzerland
3. Cardiovascular Division, Mayo Clinic, Rochester, Minnesota, USA
4. Division of Cardiology, University Children’s Hospital, Zurich, Zurich, Switzerland
5. Division of Cardiology, Inselspital, Bern, Switzerland