Ingeborg Maria LangohrDiagnostic Center for Population and Animal Health, College of Veterinary Medicine, Michigan State University, Lansing, MI 48910.
Heitor Flavio FerrariDepartment of Clinics, Surgery and Animal Reproduction, Faculdade de Medicina Veterinária, Universidade Estadual de São Paulo—Araçatuba, SP 16050-680, Brazil.
Maria Cecilia Rui LuvizottoDepartment of Clinics, Surgery and Animal Reproduction, Faculdade de Medicina Veterinária, Universidade Estadual de São Paulo—Araçatuba, SP 16050-680, Brazil.