1. ARTORG Center for Biomedical Engineering Research University of Bern Bern Switzerland
2. Department for Cardiovascular Surgery Inselspital, Bern University Hospital, University of Bern Bern Switzerland
3. Swiss Cardio Technologies AG Stansstad Switzerland
4. Department of Anesthesiology and Pain Medicine Inselspital, Bern University Hospital, University of Bern Bern Switzerland