1. Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina, State University, Raleigh, NC 27606.
2. California National Primate Research Center, University of California, Davis, CA 95616.
3. Center of Agroveterinarian Sciences, Santa Catarina State University, Lages, SC 88501-100, Brazil.
4. Department of Animal Science, University of California, Davis, California.