1. Fraunhofer Institute for Cell Therapy and Immunology; Branch Bioanalytics and Bioprocesses (Fraunhofer IZI-BB); Department Cellular Biotechnology & Biochips; Am Mühlenberg 13 14476 Potsdam-Golm Germany
2. Max Planck Institute for Colloids and Interfaces; Am Mühlenberg 1 14476 Potsdam-Golm Germany
3. Heinrich-Heine-Universität Düsseldorf; Institut für Organische und Makromolekulare Chemie; Universiätsstr.1 40225 Düsseldorf Germany
4. School of Science and Technology; Nottingham Trent University; Clifton Lane Nottingham NG11 8NS UK