1. Department of Breast Surgery, Harbin Medical University Cancer Hospital, Harbin, China
2. Sino-Russian Medical Research Center, Heilongjiang Academy of Medical Sciences, Harbin, China
3. Department of Anesthesiology, The Second Affiliated Hospital, Harbin Medical University, Harbin, China
4. Department of Epidemiology, Public Health College of Harbin Medical University, Harbin, China