Improved analysis of brachial artery ultrasound using a novel edge-detection software system - Woodman, R J; Playford, D A; Watts, G F; Cheetham, C; Reed, C; Taylor, R R; Puddey, I B; Beilin, L J; Burke, V; Mori, T A; Green, D (J Appl Physiol, 2001)