1. Department of Mechanical Engineering and Institute of Medical Engineering (IMETUM); Technical University of Munich; 85748 Garching Germany
2. Nanobiophysics group; MESA+ Institute for Nanotechnology and MIRA Institute for Biomedical Technology and Technical Medicine; University of Twente; 7500 AE Enschede The Netherlands
3. Institute for Medicine and Engineering; University of Pennsylvania; Philadelphia PA 19104 USA