1. The First Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
2. Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
3. Department of Pathology, Asahikawa Medical College, Asahikawa, Japan
4. Department of Host Defense, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
5. Department of Immunology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan