1. Department of Mechanical Engineering, IMES, ETH Zurich, Tannenstrasse 3, CH-8092 Zurich, Switzerland
2. Johnson & Johnson Medical GmbH, Robert-Koch-Strasse 1, 22851 Norderstedt, Germany
3. Johnson & Johnson Consumer France SAS, Skin Care Research Institute, 92787 Issy-les-Moulineaux, France
4. Department of Mechanical Engineering, IMES, ETH Zurich, Tannenstrasse 3, CH-8092 Zurich, Switzerland; EMPA-Materials Science & Technology, Überlandstrasse 129, CH-8600 Dubendorf, Switzerland