Karl-Heinz Orend（Department of Vascular Surgery, Ulm University（Germany））, Benjamin M. Jackson（Division of Vascular Surgery, Hospital of the University of Pennsylvania（USA））, Chun-Che Shih（Chief, Division of Caoriovascular Surgery, Taipei Veterans General Hospital, Taipei（Taiwan））, Yoshihiko Kurimoto（Cardiovascular Surgery, Teine Keijinkai Hospital（Japan））, Takao Ohki （Department of Surgery, Jikei University school of Medicine（Japan））