1. Center for Reproductive Medicine, Department of Obstetrics and GynecologyThe Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing China
2. Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Drum Tower Clinic Medical College of Nanjing Medical UniversityNanjing China
3. Department of Histology and EmbryologyShanxi Medical UniversityTaiyuan China
4. Clinical Center for Stem Cell Research, Department of Experimental Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing China