1. Institute of Cancer Stem Cell, Cancer Center, Dalian Medical University, Dalian, 116044, Liaoning, P.R. China
2. Department of Neurosurgery, The Second Hospital of Dalian Medical University, Dalian, 116023, Liaoning, P.R. China
3. Department of Obstetrics and Gynecology, The Second Xiangya Hospital of Central South University, Changsha, 410011, Hunan, P.R. China