Cardio-ankle vascular index measures arterial wall stiffness independent of blood pressure - Ibata, J; Sasaki, H; Kakimoto, T; Matsuno, S; Nakatani, M; Kobayashi, M; Tatsumi, K; Nakano, Y; Wakasaki, H; Furuta, H; Nishi, M; Nanjo, K (Diabetes Res Clin Pract, 2008)