1. Shaanxi Key Laboratory of Degradable Biomedical Materials Northwest University Taibai North Road 229 Xi'an Xi'an Shaanxi 710069 China
2. Shaanxi R&D Center of Biomaterials and Fermentation Engineering School of Chemical Engineering Northwest University Xi'an 710069 China
3. Clinical Medical Research Center of the Affiliated Hospital Inner Mongolia Medical University 1 Tong Dao Street, Inner Mongolia Autonomous Region Hohhot 010050 P. R. China