1. Department of Biochemistry & Molecular Biology, Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, PR China
2. Department of Clinical Laboratory, Daqing Medical College, Daqing, Heilongjiang 163311, PR China
3. Department of pathology, Heilongjiang Nursing College, Harbin, Heilongjiang 150000, PR China
4. The 1st Clinical Medical College, Southern Medical University, Guangzhou, Guangdong 510000, PR China