1. Department of Cell Biology; Basic Medical College of Liaoning Medical University; Jinzhou Liaoning 121000 China
2. Department of Radiotherapy; Center Hospital of Handan; Handan Hebei 056001 China
3. Department of Pathophysiology; School of Basic Medical Science; China Medical University; Shenyang Liaoning 110001 China
4. Department of Histology and Embryology; Basic Medical College of Liaoning Medical University; Jinzhou Liaoning 121000 China