1 Department of Intervention, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China. Electronic address: jieru375@sina.com.
2 Department of Intervention, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.
3 Division of Interventional Radiology, Department of Radiology, UCLA Medical Center, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA; Division of Liver and Pancreas Transplant Surgery, Department of Surgery, UCLA Medical Center, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA. Electronic address: edwardlee@mednet.ucla.edu.