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1Peter F S.Portal vein anomalies in the dog:their angiographic diagnosis[J].J Am Vet Radilo Soc,1975,16:84-97.
2Donald E Thrall.Textbook of veterinary radiography[M].USA:The W B Saunders Company,1986:391-400.
3Carol H C,Jian-Xin WU.Anatomy of the portal and hepatic veins of the dog:a basis for systematic evaluation of the liver by ultrasonography[J].Veterinary Radiology & Ultrasound,1995,36(3):227-233.
4Sibylle S,Peter F S.Angiogrphy of the hepatic and portal venous system in the dog and cat:an investigative method[J].Veterinary Radiology,1980,21(2):57-77.
