1. Institute of Cancer Stem Cell, Dalian Medical University Cancer Center, Dalian, China
2. Department of Hepatobiliary Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China
3. State Key Laboratory of Brain and Cognitive Sciences, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
4. Department of Molecular and Cellular Biochemistry, College of Medicine, University of Kentucky, Lexington, Kentucky, USA