Radiation therapy in the treatment of canine and feline thymomas: a retrospective study (1985-1999). - Smith AN; Wright JC; Brawner WR Jr; LaRue SM; Fineman L; Hogge GS; Kitchell BE; Hohenhaus AE; Burk RL; Dhaliwal RS; Duda LE (Journal of the American Animal Hospital Association, 2001)