Affiliation: | 1.Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, 080-8555, Japan ;2.Airwater Co. Ltd, Sapporo, Hokkaido, 003-0027, Japan ;3.Graduate School of Agriculture Science, Kobe University, Kobe, 657-8501, Japan ; |