1. Department of Pediatrics, Kitano Hospital, Tazuke Kofukai Medical Research Institute, Osaka, Japan;
2. Department of Emergency, Nakakawachi Medical Center of Acute Medicine, Osaka, Japan;
3. Nagoya City Public Health Research Institute, Nagoya, Japan;
4. Department of Pathology, Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka, Japan;
5. First Department of Pathology, Kurume University School of Medicine, Kurume, Japan;
6. Department of Legal Medicine, Kinki University School of Medicine, Osakasayama, Japan;
7. Department of Molecular Bacteriology, Nagoya University Graduate School of Medicine, Nagoya, Japan; and
8. Department of Pediatrics, Shimane University School of Medicine, Izumo, Japan