1. Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 China
2. Laboratory Animal Center; Jilin University; Changchun 130012 China
3. Department of Materials Science and Engineering; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA
4. Laboratory of Computer-Aided Drug Design and Discovery; Beijing Institute of Pharmacology and Toxicology; Beijing 100850 China