1. Department of Obstetrics & Gynecology, the First Affiliated Hospital of Anhui Medical University, Hefei 230020, Anhui, P. R. China
2. Department of Pathology, Anhui Medical University, Hefei, Anhui 230032, P. R. China
3. The Cancer Hospital of the University of Chinese Academy of Sciences, Aptamer Selection Center, Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, P. R. China
4. State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin 300350, P. R. China