1. Clinical Biochemistry Unit, Division of Pathology and Pathophysiology, National Institute of Animal Health, National Agriculture and Food Research Organization (NARO), 3-1-5 Kannondai, Tsukuba, Ibaraki 305-0856, Japan
2. Research and Development Center, NH Foods Ltd., 3-3 Midorigahara, Tsukuba, Ibaraki 300-2646, Japan
3. Animal Bioregulation Unit, Division of Animal Sciences, Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), 1-2 Owashi, Tsukuba, Ibaraki 305-8634, Japan
4. Japan Association for Techno-innovation in Agriculture, Forestry and Fisheries (JATAFF), 446-1 Kamiyokoba Aza Ippaizuka, Tsukuba, Ibaraki 305-0854, Japan
5. Laboratory of Animal Breeding and Genetics, Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8572, Japan