1. Veterinary Diagnostic Laboratory, Marupi Lifetech Co., Ltd., 103 Fushiocho, Ikeda, Osaka 563-0011, Japan
2. Laboratory of Veterinary Internal Medicine, Department of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-Orai-Kita, Izumisano, Osaka 598-8531, Japan