1. Department of Histology and Embryology, School of Basic Medicine, Southern Medical University, Guangzhou 510515, China
2. Department of Spinal Surgery, Orthopedic Medical Center, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
3. Biomaterials Research Center, School of Biomedical Engineering, Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Southern Medical University, Guangzhou 510515, China
4. Department of Human Anatomy, Histology and Embryology, Zhuhai Campus of Zunyi Medical University, Zhuhai 519041, China
5. Central Laboratory, The Fifth Affiliated Hospital, Southern Medical University, Guangzhou 510999, China
6. National Experimental Education Demonstration Center for Basic Medical Sciences, National Virtual & Reality Experimental Education Center for Medical Morphology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China