1. The Fourth Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin 150040, China
2. The Sixth Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin 150040, China
3. Department of Pathophysiology, Harbin Medical University, Harbin 150081, China
4. The Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, China