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Ogbu, Cosmas Chikezie, Department of Veterinary Biochemistry and Animal Production, Michael Okpara University of Agriculture Umudike, Abia State, Nigeria
Olarve, Joseph P , Department of Veterinary Clinical Science, College of Veterinary Medicine, University of the Philippines Los Baños, Laguna, Philippines
Ondho, Yon Soepri, Faculty of Animal and Agricultural Sciences, Diponegoro University, Semarang, Indonesia