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Yuhong Ren*, Jose G Rivera, Lihong He, Harsha Kulkarni, Dong-Keun Lee and Phillip B Messersmith*
* Corresponding authors: Yuhong Ren yhren@ecust.edu.cn - Phillip B Messersmith philm@northwestern.edu
BMC Biotechnology 2011, 11:63 doi:10.1186/1472-6750-11-63