1 Division of Vascular and Endovascular Surgery, Department of Surgery, University of Virginia, Charlottesville, VA, USA; Department of Vascular Surgery, Graduate School of Medicine, University of Tokyo, Tokyo, Japan. Electronic address: shirasu-tky@umin.ac.jp.
2 Department of Vascular Surgery, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
3 Department of Vascular Surgery, Saitama Medical Centre, Saitama Medical University, Kawagoe, Saitama, Japan.