Changes

==References==

==References==

Morris J, Dobson J (2001) Small Animal Oncology , Gastrointestinal Tract, pp 125-127

* Morris J, Dobson J (2001) Gastrointestinal Tract, in Small Animal Oncology, Blackwell Science, pp 125-127

Withrow S. J, Vail D. M (2007) Withrow and MacEwen's Small Animal Clinical Oncology, fourth edition. Chapter 21, Cancer of the Gastrointestinal Tract, pp 477-478

* Withrow S. J, Vail D. M (2007, Cancer of the Gastrointestinal Tract, in Withrow and MacEwen's Small Animal Clinical Oncology, fourth edition, Missouri, Saunders Elsevier, pp 477-478