1. Posgrado Regional en Ciencias Veterinarias Tropicales
2. Programa de Investigación en Enfermedades Tropicales
3. Escuela de Medicina Veterinaria, Universidad Nacional, Heredia, Costa Rica, the Centers for Epidemiology and Animal Health, Veterinary Serices, USDA, APHIS, Ft. Collins, CO 80521
4. Center of Veterinary Epidemiology and the Animal Disease Surveillance Systems, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Ft. Collins, CO 80523–1676