1. Product Development Group Zurich ETH Zurich Tannenstrasse 3 Zurich 8092 Switzerland
2. Cardiothoracic Surgery Stanford University Stanford CA 94305‐5101 USA
3. Laboratory of Biosensors and Bioelectronics ETH Zurich Gloriastrasse 35 Zurich 8092 Switzerland
4. DZHK (German Center for Cardiovascular Research) Partner Site Berlin 10785 Berlin Germany
5. Department of Cardiovascular Surgery Charité—Universitätsmedizin Berlin Charitéplatz 1 10117 Berlin Germany
6. Department of Cardiothoracic and Vascular Surgery German Heart Center Berlin Augustenburger Pl. 1 13353 Berlin Germany
7. Department of Health Sciences and Technology Tannenstrasse 3 Zürich 8092 Switzerland
8. Division for Surgical Research University Hospital Zurich and University of Zurich Rämistrasse 100 Zürich 8091 Switzerland