1. Xuzhou Health Hospital of Women and Children, Department of Pathology, Xuzhou 221009, P. R. China
2. Tumor Hospital of Linyi city, Department of Pathology, Linyi, 276000, P. R. China
3. Third Affiliated Hospital of Nanjing Traditional Chinese Medical University, Molecular Pathology Laboratory, Nanjing, 210001, P. R. China