1. Department of Veterinary Science; National Institute of Infectious Diseases; 1-23-1 Toyama Shinjuku-ku, Tokyo 162-8640 Japan
2. Laboratory of Microbiology; Japan Community Healthcare Organization Kyushu Hospital; 1-8-1 Kishinoura Yahatanishi-ku, Kitakyushu Fukuoka 806-8501 Japan
3. Department of Cardiology; Japan Community Healthcare Organization Kyushu Hospital; 1-8-1 Kishinoura Yahatanishi-ku, Kitakyushu Fukuoka 806-8501 Japan
4. Department of Clinical Laboratory; Iida Municipal Hospital; 438 Yawatacho, Iida Nagano 395-8502 Japan
5. Department of Neurology; Iida Municipal Hospital; 438 Yawatacho, Iida Nagano 395-8502 Japan
6. Department of Clinical Laboratory; Okayama Kyoritsu General Hospital; 8-10 Akasaka-honmachi Naka-ku, Okayama 703-8511 Japan
7. Department of Internal Medicine; Okayama Kyoritsu General Hospital; 8-10 Akasaka-honmachi Naka-ku, Okayama 703-8511 Japan