1. Department of Cancer Prevention and Treatment, Cancer Hospital of China Medical University/Liaoning Cancer Hospital & Institute, Shenyang, China
2. Department of Clinical Epidemiology and Center of Evidence Based Medicine, The First Hospital of China Medical University, Shenyang, China
3. Department of Hepatobiliary surgery, Cancer Hospital of China Medical University/Liaoning Cancer Hospital & Institute, Shenyang, China
4. Center of medical examination, Cancer Hospital of China Medical University/Liaoning Cancer Hospital & Institute, Shenyang, China