1. Laboratorio de Farmacología; Centro de Investigación Veterinaria de Tandil (CIVETAN-CONICET); Facultad de Ciencias Veterinarias; UNCPBA; Tandil Argentina
2. Institute of Parasitology; McGill University; Ste-Anne-de-Bellevue QC Canada
3. Department of Pathobiology and Diagnostic Investigation; College of Veterinary Medicine; Michigan State University; East Lansing MI USA