Department of Pharmaceutical Engineering and Department of Biomedical Engineering School of Engineering China Pharmaceutical University Nanjing 211198 People's Republic of China;
Institute of Chemistry and Biochemistry Freie Universit(a)t Berlin Takustrasse 3 14195 Berlin Germany;
State Key Laboratory of Polymer Materials Engineering College of Polymer Science and Engineering Sichuan University Chengdu 610065 People's Republic of China;
State Key Laboratory of Natural Medicines National R&D Center for Chinese Herbal Medicine Processing China Pharmaceutical University Nanjing 211198 People's Republic of China;