Shibahara T, Ishikawa Y, Kadota K, Sato K, Ogiso M
Hokkaido Research Station, National Institute of Animal Health, Ministry of Agriculture, Forestry and Fisheries, Sapporo, Japan.
Aust Vet J. 2000 Sep;78(9):640-2. doi: 10.1111/j.1751-0813.2000.tb11943.x.