1. Department of Obstetrics; University Hospital Zurich; University of Zurich; Schmelzbergstr. 12 8091 Zurich Switzerland
2. Institute for Biomechanics; Swiss Federal Institute of Technology; CH-8008 Zurich Switzerland
3. Functional Genomics Center University of Zurich and ETH Zurich; Winterthurerstr. 190 8057 Zürich Switzerland
4. Department of Biomedicine and Department of Surgery; University Hospital Basel; University of Basel; Hebelstrasse 20 4031 Basel Switzerland
5. Institute of Bioengineering; Ecole Polytechnique Fédérale de Lausanne (EPFL); Station 15, Bld AI 1109 1015 Lausanne Switzerland