1. Department of Poultry Production, Faculty of Agriculture, Kafrelsheikh University, 333516 Kafr El-Sheikh, Egypt
2. Department of Biochemical Science and Technology, Faculty of Agriculture, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan
3. Biogenkoji Research Institute, 876-15 Mizobe, Kirishima 899-6404, Japan