1. School of Public Health; Mudanjiang Medical University; Mudanjiang China
2. Hongqi Hospital; Mudanjiang Medical University; Mudanjiang China
3. Department of Foreign Language; Mudanjiang Medical University; Mudanjiang China
4. School of Public Health; Harbin Medical University; Harbin China
5. Department of Clinical Laboratory, Shanghai Pudong Hospital; Fudan University Pudong Medical Center; Shanghai China