Daniel Mota-Rojas, Mar?a Alonso-Spilsbury, Lilian Mayagoitia Novales, Mar?a Elena Trujillo, Javier Valencia, Ramiro Ram?rez- Necoechea, Sa?l Cort?s and Isabel Escobar
Journal of Animal and Veterinary Advances 3 ( 12 ): 828 - 832 , 2004