1. Department of Microbiology, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
2. Department of Infectious Diseases, Tokyo Medical University Hachioji Medical Center, 1163 Tatemachi, Hachioji, Tokyo 193-0998, Japan
3. Department of Surgery, Nippon Medical School Tama Nagayama Hospital, 1-7-1 Nagayama, Tama, Tokyo 206-8512, Japan
4. Department of Oral Surgery, Tokai University Hachioji Hospital, 1838 Ishikawa, Hachioji, Tokyo 192-0032, Japan
5. Department of Digestive Surgery, National Hospital Organization Disaster Medical Center, 3256 Midori, Tachikawa, Tokyo 190-0014, Japan
6. Department of Pediatrics, Fussa Hospital, 1-6-1 Kamidaira, Fussa, Tokyo 197-8511, Japan
7. Department of Surgery, Ome Municipal General Hospital, 4-16-5 Higashiome, Ome, Tokyo 198-0042, Japan
8. Department of Respiratory Medicine, Tachikawa Sogo Hospital, 1-16-15 Nishiki, Tachikawa, Tokyo 190-8578, Japan
9. Department of Internal Medicine, Akiru Municipal Medical Center, 78-1 Hikita, Akiruno, Tokyo 197-0834, Japan