1. Physical Chemistry, University of Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
2. Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Research Campus Golm, D-14424 Potsdam, Germany
3. Berlin Brandenburg Center for Regenerative Therapies/Julius Wolff Institute, Charité−Universitätsmedizin Berlin, D-13353 Berlin, Germany
4. Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Research Campus Golm, D-14424 Potsdam, Germany