1. Department of Animal Sciences, University of Goettingen, Goettingen, Germany
2. Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada
3. Lucta Flavours Co. Ltd., Guangzhou, China
4. Animal and Poultry Production Department, Faculty of Agriculture, South Valley University, Qena, Egypt
5. College of Animal Science and Technology, Hebei Agricultural University, Baoding, China
6. BIOMIN America Inc., Overland Park, KS