1. Department of Gynecologic Oncology, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing 100006, P.R.China
2. National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, P.R. China
3. Department of Radiation Toxicology and Oncology, Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing 100850, P.R. China