1. Department of Histology and Embryology, GDMPA Key Laboratory of Key Technologies for Cosmetics Safety and Efficacy Evaluation, NMPA Key Laboratory for Safety Evaluation of Cosmetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, P. R. China
2. Regenerative Medicine and Tissue Repair Research Center, Huangpu Institute of Materials, Guangzhou 511363, P. R. China