1. College of Chemistry and Materials Engineering Beijing Technology & Business University Beijing 100048 P. R. China
2. Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Division and 4th Medical Center PLA General Hospital and PLA Medical College Beijing 100048 P. R. China
3. PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration PLA General Hospital Beijing 100048 P. R. China
4. BTBU-TANGYI Innovation Center for The Evaluation of The Safety and Efficacy of Bioengineering Raw Materials Beijing 100048 P. R. China