1. Orthopaedic Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong 524001, P.R. China
2. Laboratory of Gastroenterology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong 524001, P.R. China
3. Department of Orthopaedic Surgery, The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong 524001, P.R. China
4. Stem Cell Research and Cellular Therapy Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong 524001, P.R. China