1. The State Key Laboratory of Bioreactor Engineering; East China University of Science and Technology; Shanghai P.R. China
2. Key Laboratory for Ultrafine Materials of Ministry of Education; East China University of Science and Technology; Shanghai P.R. China
3. Engineering Research Centre for Biomedical Materials of Ministry of Education; East China University of Science and Technology; Shanghai P.R. China
4. Fischell Department of Bioengineering, Institute for Bioscience and Biotechnology Research; University of Maryland; College Park MD USA