1. Division of Cardiology; University Hospital Basel; Switzerland
2. Division of Cardiology; Internal Medicine University Department; Kantonsspital Baselland Bruderholz Switzerland
3. Cardiology Division; Kantonsspital St Gallen; St Gallen Switzerland
4. Cardiology Division; Triemli Hospital; Zürich Switzerland
5. Cardiology Division; University Hospital; Leuven Belgium
6. Department of Cardiology; Maastricht University Medical Center; Maastricht the Netherlands