1. Gifu University Graduate School of Medicine; Gifu Gifu 501-1194 Japan
2. The Chemo-Sero-Therapeutic Research Institute; Kumamoto Kumamoto 860-8568 Japan
3. Department of Research; Kyokuto Pharmaceutical Industrial Co., Ltd.; Chuo-ku Tokyo 103-0024 Japan
4. Department of Host Defense; Osaka City University, Graduate School of Medicine; Osaka Osaka 545-8586 Japan
5. Department of Clinical Laboratory; Ohgaki Municipal Hospital; Ohgaki Gifu 503-8502 Japan