1. Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
2. Department of Pharmaceutical Engineering, China Pharmaceutical University, Nanjing 211198, P. R. China
3. Department of Hepatology and Gastroenterology, Charité Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
4. German Cancer Consortium (DKTK), Partner Site Berlin, 13353 Berlin, Germany
5. Biomedical Polymers Laboratory, College of Chemistry, Chemical Engineering and Materials Science, and State Key Laboratory of Radiation Medicine and Protection, Soochow University, Suzhou 215123, P. R. China