1. Lab of Bioengineering, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin Key Laboratory of Biomedical Materials; Tianjin 300192 China
2. Department of Gynecology; Tianjin Central Hospital of Gynecology Obstetrics; Tianjin 300100 China
3. Department of Stomatology; Tianjin First Central Hospital; Tianjin 300192 China