1. Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
2. Department of Hepatobiliary Surgery, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
3. Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
4. Department of Neurosurgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China