[1] New York State Anim Hlth Diagnost Ctr, POB 5786,Room A2,232, Ithaca, NY 13081 USA
[2] Cornell Univ, Dept Populat Med & Diagnost Sci, POB 5786,Room A2 232, Ithaca, NY 14853 USA
[3] Iowa State Univ, Coll Vet Med, Vet Diagnost & Prod Anim Med, 2659 Vet Med, Ames, IA 50011 USA