1. Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China
2. Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
3. Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing 100026, China