1. Department of Animal Breeding and Nutrition Bydgoszcz University of Science and Technology Bydgoszcz Poland
2. Department of Meat Science West Pomeranian University of Technology Szczecin Poland
3. Department of Animal Biotechnology and Genetics Bydgoszcz University of Science and Technology Bydgoszcz Poland
4. Department of Poultry Production Sohag University Sohag Egypt