1. Institute for Surgical Technology and Biomechanics; University of Bern; Stauffacherstrasse 78 CH-3014 Bern Switzerland
2. Department of Hematology and Central Hematology Laboratory; University of Bern; Inselspital, Bern University Hospital; CH-3010 Bern Switzerland
3. Department for BioMedical Research; University of Bern; CH-3010 Bern Switzerland
4. Institute of Textile Machinery and High Performance Material Technology; TU Dresden; DE-01069 Dresden Germany
5. Department of Orthopaedic Surgery and Traumatology; University of Bern; Inselspital, Bern University Hospital; CH-3010 Bern Switzerland