1. Department of Anesthesiology and Pain Therapy, Inselspital, University of Bern; Bern Switzerland
2. Department Diagnostic and Interventional Neuroradiology, Inselspital, University of Bern; Bern Switzerland
3. Department Cardiovascular Surgery, Inselspital, University of Bern; Bern Switzerland
4. Institute of Pathology, Inselspital, University of Bern; Bern Switzerland