1. Department of Endocrinology, The First Clinical Medical College, Guangdong Medical University, Zhanjiang, Guangdong, PR China
2. Department of Histology and Embryology, School of Basic Medicine, Guangdong Medical University, Zhanjiang, Guangdong, PR China
3. Department of Pathology, School of Basic Medicine, Guangdong Medical University, Dongguan, Guangdong, PR China
4. Department of Biology, School of Basic Medical Science, Guangdong Medical University, Zhanjiang, Guangdong, PR China