1. Institut de Microelectrònica de Barcelona, IMB-CNM (CSIC), Bellaterra, Barcelona 08193, Spain
2. Biomimetic Systems for Cell Engineering, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona 08028, Spain
3. Centro de Investigación Biomédica en Red (CIBER), Madrid 28029, Spain
4. Department of Electronics and Biomedical Engineering, University of Barcelona (UB), Barcelona 08028, Spain