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 (J Am Anim Hosp Assoc, 2001)