1. The Sixth Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
2. Department of Neurology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, China
3. Department of Pathology, Harbin Medical University Cancer Hospital, Harbin, China
4. Department of Oncology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
5. Department of Oncology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
6. Department of Oncology, The First Affiliated Hospital of Qiqihar Medical College, Qiqihar, China