Dökmeci, A K Collateral veins in portal hypertension: demonstration by sonography. [electronic resource] - AJR. American journal of roentgenology Dec 1981 - 1173-7 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0361-803X Standard No.: 10.2214/ajr.137.6.1173 doi Subjects--Topical Terms: Collateral CirculationHumansHypertension, Portal--diagnosisRadiographyUltrasonography