1. Stem Cell Research and Cellular Therapy Center, Orthopedic Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang 524001, P. R. China
2. Shenzhen Institute of Guangdong Ocean University, Shenzhen 518108, P. R. China
3. College of Food Science and Technology, Guangdong Ocean University, Zhangjiang 518108, P. R. China