1. Department of Veterinary Anatomy University of Nigeria, Nsukka & Histology division Faculty of health Sciences, University of Witswatersrand Nsukka Nigeria
2. Histology Division Faculty of Health Sciences University of Witwatersrand Johannesburg South Africa
3. Laboratory of Cell Biology and Histology Department of Veterinary Anatomy Faculty of Veterinary Medicine Ahmadu Bello Univ Zaria Nigeria