1 Division of Digestive and Liver Diseases, Department of Internal Medicine, Liver Tumor Translational Research Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas.
2 Department of Gastroenterology and Hepatology, Mie University, Tsu, Mie, Japan.
3 Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.