1. Department of Cardiology, Inselspital, University of Bern, Bern, Switzerland
2. Department of Anesthesiology and Pain Medicine, Inselspital, University of Bern, Bern, Switzerland
3. Clinical Trials Unit, University of Bern, Bern, Switzerland
4. Department of Cardiovascular Surgery, Inselspital, University of Bern, Bern, Switzerland