1. Institute of Pathology and Southwest Cancer Center Southwest Hospital Third Military Medical University (Army Medical University) and Key Laboratory of Tumor Immunopathology Ministry of Education of China Chongqing 400038 China
2. Bio‐Bank of Southwest Hospital Third Military Medical University (Army Medical University) Chongqing 400038 China
3. Department of Neurosurgery Southwest Hospital Third Military Medical University (Army Medical University) Chongqing 400038 China