Evaluation of postprandial hyperemia in superior mesenteric artery and portal vein in healthy and cirrhotic humans: an operator-blind echo-Doppler study. - Sabba,C.; Ferraioli,G.; Genecin,P.; Colombato,L.; Buonamico,P.; Lerner,E.; Taylor,K.J.; Groszmann,R.J. (Hepatology, 1991)