1. Department of CardiologyUniversity Hospital of Basel, University of Basel Switzerland
2. Department of CardiologyUniversity Heart Center, University of Zurich Switzerland
3. Department of CardiologyCenter for Congenital Heart Disease, Inselspital, University of Bern Switzerland
4. Department of Cardiology and Cardiac Surgery (CHUV)Centre Hospitalier Universitaire Vaudois Lausanne Switzerland
5. Cardiology, Kantonsspital St. Gallen St. Gallen Switzerland
6. Klinik im Park Zurich Switzerland