A Change of Duplex Sonographic Velocities and Flow of Infrapopliteal Vein Graft in 30 Days After Surgery is a Strong Predictor for 1-year Graft Patency. (December 2019) - Kuriyama, Naoya; Kikuchi, Shinsuke; Tatsukawa, Takamitsu; Tochikubo, Ai; Uchida, Daiki; Koya, Atsuhiro; Azuma, Nobuyoshi