1. Hepatic Surgery Center, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
2. Hubei Province for the Clinical Medicine Research Center of Hepatic Surgery, Wuhan, China
3. Department of Oncology, Tongji Hospital
4. Department of Epidemiology and Biostatistics School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
5. Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
6. Birmingham Veterans Affairs Medical Center, Birmingham, AL, USA