1. Obihiro University of Agriculture and Veterinary Medicine; Obihiro Japan
2. NARO Institute of Livestock and Grassland Science; Nasushiobara Tochigi Japan
3. NARO Hokkaido Agricultural Research Center; Sapporo Japan
4. National Livestock Breeding Center; Nishigo Fukushima Japan
5. Rakuno Gakuen University; Ebetsu Japan
6. Nihon University; Fujisawa Japan