1. School of Medicine, Shandong University, Jinan
2. Departments of Pathology and Gastroenterology, People's Hospital of Rizhao
3. Departments of General Surgery and Neurosurgery, The Shanghai Deji Hospital, Shanghai
4. Departments of Neurosurgery, The Shanghai Deji Hospital, Shanghai
5. Department of Hyperbaric Oxygen, Central Hospital of Rizhao, Rizhao, ShanDong
6. Department of Gastroenterology, People's Hospital of Rizhao
7. Department of Pathology, Anhui Cancer Hospital & Anhui Provincial Hospital Affiliated to Anhui Medical University, Hefei, Anhui, P. R. China