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A. Estrada
Mexico
Facultad de Medicina Veterinaria y Zootecnia, Universidad Automa de Sinaloa, Mico
Oreste La O
Cuba
Instituto de Ciencia Animal, Apartado Postal 24, San Josde las Lajas, Mayabeque, Cuba
J. J. Portillo
Mexico
Facultad de Medicina Veterinaria y Zootecnia, Universidad Automa de Sinaloa, Mico
Rafael Segundo Herrera
Cuba
Instituto de Ciencia Animal, Apartado Postal 24, San Josde las Lajas, Mayabeque, Cuba
Mexico
Instituto de Investigaci en Ciencias Veterinarias (UABC), Mexicali, Baja California 21100, Mico
F. G. Rios
Mexico
Facultad de Medicina Veterinaria y Zootecnia, Universidad Automa de Sinaloa, Mico
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