1. Department of Pharmaceutical Engineering, School of Engineering, China Pharmaceutical University, Nanjing, P. R. China
2. Biomedical Polymers Laboratory, Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, P. R. China
3. Department of Polymer Chemistry and Biomaterials, Faculty of Science and Technology MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, Netherlands