1. Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian 350122, China
2. Anatomy Teaching Office, Basic Medical Science Department, Fujian Health College, Fuzhou, Fujian 350101, China
3. Cellular and Developmental Engineering Center, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian 350122, China