1. Lab of Tissue Engineering Faculty of Life Science, Northwest University, Xi’an, Shaanxi Province, P.R. China;
2. Provincial Key Laboratory of Biotechnology of Shaanxi, Northwest University, Xi’an, Shaanxi Province, P.R. China;
3. Key Laboratory of Resource Biology and Modern Biotechnology in Western China Ministry of Education, Northwest University, Xi’an, Shaanxi Province, P.R. China