1. Division of Histology & Embryology, Key Laboratory for Regenerative Medicine of the Ministry of Education, Medical College, Jinan University, Guangzhou, China
2. International Joint Laboratory for Embryonic Development & Prenatal Medicine, Medical College, Jinan University, Guangzhou, China
3. Department of Gynaecology and Obstetrics, The First Affiliated Hospital of Jinan University, Guangzhou, China
4. School of Nursing, Guangzhou University of Chinese Medicine, Guangzhou, China