1. Blood Transfusion Department, the General Hospital of the People’s Liberation Army, Beijing 100853, China
2. Department of Obstetrics and Gynecology, First Affiliated Hospital of the General Hospital of the People’s Liberation Army, Beijing 100048, China
3. Department of Obstetrics and Gynecology, Tangdu Hospital, Fourth Military Medical University, Xi’an 710038, China
4. Department of Obstetrics and Gynecology, the General Hospital of the People’s Liberation Army, Beijing 100853, China
5. Tissue Engineering Research Center of Academy of Military Medical Sciences, Beijing 100850, China