Affiliation: | 1.Department of Anatomy, Histology & Embryology, Medical College of Xi''an Jiaotong University, Xi''an 710061, China;2.Research Center of Reproductive Medicine, Medical College of Xi''an Jiaotong University, Xi''an 710061, China;3.Department of Pathology, Medical College of Xi''an Jiaotong University, Xi''an 710061, China |