1. Bangkok Animal Research Center Co., Ltd. 74/4 mu 7 Naiklongbangplakod, Prasamutjedi, Samutprakarn 10290, Thailand
2. Hayashibara Co. Ltd., 1-1-3 Shimoishii, Kita-ku, Okayama 700-0907, Japan
3. Animal Nutrition, Life Sciences, Graduate School of Agricultural Science, Tohoku University, Aramaki Aza Aoba 468-1, Aoba-ku, Sendai 980-8572, Japan.