1. Department of Medical and Biomedical Engineering Higher Technical Teachers' Training College, University of Yaoundé 1 Ebolowa Cameroon
2. Department of Chemical Sciences University of Johannesburg Doornfontein South Africa
3. Department of Pharmaceutical Sciences, Health Sciences Centre Federal University of Santa Catarina Florianópolis Brazil
4. Department of Animal Biology and Physiology University of Yaoundé 1 Yaounde Cameroon
5. Department of Animal Science, Faculty of Agriculture and Veterinary Medicine University of Buea Buea Cameroon
6. Department of Biological Sciences University of Ngaoundere Ngaoundere Cameroon