1. Key Laboratory of Systems Bioengineering, Ministry of Education and Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, P.O. Box 6888, Tianjin University, Tianjin 300072, People's Republic of China
2. College of Biology Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, 050018, People's Republic of China
3. School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637457